Quiz
FINAL PHYSICS EXAM PREP
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Fragen in diesem Quiz (42)
1You are lowering a water bottle down. The work done by you on the water bottle is?
- A+
- B_
- C0
2What is the work done by the two forces together in moving the object a distance x to the right as shown in the diagram? The magnitude of each force is F an the dirction of the two forces are 90 degrees apart
- A2FX
- BFX
3A block slides down at constant speed through the length d, of a ramp. Assume mass of theblock iis m, the inclination of ramp alpha, and the fricitoion coeffictient is what is work done by friciton given by
- AUkD
- B-UkD
- C-Ukmgd
- D-ugmgdcosalpaha
4A skateboarder is launched by a spring intially compressed at a distance x as shown . The spring consant of the spring is l and the mass of the boarder including the board is m. Friction doesnt matter the maxium height h the boarder makes is given by
- Am/k*xv
- Bkx/mg
- Ckx^2/2mg
5A fun park has two water slides. Both slides have the same height but slide one is straight while slide two is curved. How does the speed v1 of a slider reaching the bottom of slide one compare with v2 the speed of slider reaching the end of slide 2?
- Av1>v2
- Bv1<v2
- Cv1=v2
6Two pucks a and b are pushed from rest across a section of ice by identical forces F. Puck b has twice the mass of puck a and both pucks are pushed from the same starting line to the same finish line. What can we say about the KE of each puck as it crosses the finish line?
- Apuck a has more KE than B
- Bpuck b has more KE than a
- Csame KE
7a 1kg mass is moved part way around a square loop as shown. The square is 2 metes on a side and the dinal postion of the mass is 1m below the orginal postion. Assume that g=10 What is the woek done by the force of gravity during this journey?
- A20 J
- B10 J
- C-10J
- D-20J
8A sports car accelerates from zero to 10m/s in two seconds
- Aq
- B1
9A slide l m long and make vertical descent of hm. What is the speed of a child at the end of slide who starts slidinng from the top? Assume friciton is 75 N and the mass of the child is 35kg. Which one of the formula is best to solve this?
- Akf + Uf=ki+ui
- BWnc= delta k+delta U
10a 1.0 kg block is sliding over a horzitonL FRICTIONLESS surface with intial speed of 3 m/s to the right it briefly meets a force acting to the left as shown . What is the speed of the block after the impulse?
- A1 m/s to the left
- B1 m/s to the right
- C4 m/s to the left
- D4 m/s to the right
11consider two carts pf asses m and 2m at rest on an air track if you push first one cart for 2s and then the for the same length of time, extering equal force on each the momentum of the light cart is
- Afour times momentum of hc
- Btwice
- C=
- D1/2
12Jack and matt are intially standing on the ice with their skating gear on. Jack has mass m and Matt has ,aa 2, Jack gives an instant push to matt to the right whoch gives jack himself a speed of 4 m/s what is the maxs speed after the oush? what is the dierction of Jack's velocity
- A2 m/s right
- B2 m/s left
- C8 m/s right
- D8 m/s left
13Which of the following statemnets includes the process of finding lever arm of a force that is trying to rotate an object
- Amark axis of roation
- Bdraw line of action of force
- Cdraw shortest line from axis of roation to the line of action of force
- Dall
14a force f is applied to a wrench the force is applied a distance l from the bolt the magnitue of the torque around the bolt is
- AIF
- BIFsin theta
- CIFcostheta
15A laddder of length L is leaning againt a wall the lever arm forthe force N about the axis as shown in the diagram is given by
- AL/2costheta
- BL/2sintheta
- CLcos theta
- DLsin theta
16The net torque on the object is due to the forces about the axis as shown in the sketch is
- A2LF
- B6LF
- C-6LF
- D4LF
17A uniform solid sphere has mass m and radius r if these are increased to 2m and 3r the spheres rotational inertia about a a central axis increases by a af acto of
- A12
- B54
- C18
- D6
18A disk of mass m and radius r is rolling with a transnational speed v. The disk the rolls over the inclined plane. The maximum height reached by the disk is ? Q25
- AV^2/2g
- Bv^2/g
- C3v^2/4g
- Dv^2/4g
19mass m attached to a string that wraps around a pulley of radius R. The mass accelerates downward by pulling the string. The tension T on the sting makes the pulley rotate if the acceleration is a then
- AT=mg
- BT=mg-ma
- CT=ma-mg
- DT=mg +ma
201st clicker question: Cube A has edge length l and mass m. Cube B has edge length 2l and mass 4m. Which has greater density?
- AA has more density
- BB has more density
- Cboth have same density
21Per the previous question, Are they made of up same materials?
- AYes
- BNo
22The air pressure inside the space station is P= 12 pounds per square inch. There are two square windows in the space station; a little one and a big one. The big window is 30 cm on one side. The little window is 15 cm on a side. How does the pressure on the big window compare to the pressure on the little window? Pavg= F/A
- ASame pressure on both windows
- B2 times more pressure on the big windows
- C4 time more pressure on the big window.
23Liquid is slowly poured into the container until the liquid level has risen into tubes 1,2,3. How does the liquid in each column compare to each other?
- Ad1<d2<d3
- Bd1>d2>d3
- Cd1=d2=d3
- Dd1=d2<d3
- Ed1=d2>d3
24What can you say about the pressures at points 1, 2, 3?
- Ap1= p2= p3
- Bp1 < p2= p3
- Cp3> p1= p2
- Dp3> p1> p2
- Ep1= p3> p2
25A solid iron cube of mass m will sink in water. The cube is suspended under water by a string as shown. How does the magnitude of the tension, Tin the string compare to the magnitude of the weight mg of the mass? Hint: Draw the FBD.
- AT=mg
- BT>mg
- CT<mg
26A child may sink in water own its own but when child is inside an air bubble she won’t. The reason is that average density of child and the bubble is
- AA) equal to the density of water.
- BB) less than the density of water.
- CC) more than the density of water.
27A wooden block of mass m is floating motionless, in a bucket of water. How does the magnitude of the buoyant force FB compare to the magnitude of the weight mg of the mass? Hint: Draw the FBD.
- AFB=mg
- BFB>mg
- CFB<mg
28When we release an iron and wooden block in water, the wooden block floats but the iron block sink although wooden block is bigger in mass. Why? It is because
- AA) iron block has more weight than wooden block.
- BB) iron block has less weight than wooden block.
- CC) iron block has more density and than wooden block.
- DD) iron block has less density and than wooden block.
29A helium-filled balloon of volume V can carry a total mass M (M includes the mass of the rubber balloon but not the mass of the helium inside). What is the correct expression for the buoyant force FBon the balloon ?
- A
- B
- C
- D
- A
30As the water stream falls from a faucet, the stream gets thinner and thinner as shown in the picture. What is the correct explanation for it?
- AA) water molecules come closer as they move far from the spout.
- Bwater molecules speed up due to gravitational pull that results into smaller cross-section known from continuity equation
- Cit is because of continuity equation pulls and squeezes water flow.
31You put two empty soda cans close to each other on a frictionless surface. You gently blow air between the small gap between the cans using a straw. What happens to the cans?
- Aboth cans will move away from you
- Bboth cans will move away from each other.
- Cboth cans will move towards each other.
- Dcans will not move.
32Fluid height was same in all tubes when air pump was off. Now the pump is on and air flowing as shown. Rank in order, from lowest to highest, the liquid heights. Assume viscosity of air is negligible.
- Ah1> h2 > h3 > h4
- Bh4> h3 > h2 > h1
- Ch2> h3 > h1 > h4
- Dh2> h4 > h3 > h1
33You puncture a big hole in a rectangular metal sheet in a freezing cold day and left alone. During a hot summer day you try to fit the cut out plug on the original hole. What do you find?
- AThe plug fits on the hole.
- BThe plug is smaller than the hole.
- CThe plug is bigger than the hole.
34Which of the following is necessary to make an object oscillate for relatively long time?
i. a stable equilibrium
ii. little or no friction
iii. a disturbance- Ai only
- Bii only
- Ciii only
- Di and iii only
- Eall three
35A ball bounces up and down on a floor with perfectly elastic bounces, so that the ball bounces forever:Is this an example of simple harmonic motion?
- Ayes
- Bno
36The position of a mass on a spring as a function of time is shown below. When the mass is at point P on the graph, The signs of velocity and acceleration are
- A++
- B+-
- C--
- D-+
37A mass is oscillating back and forth on a spring without friction, as shown. At which position is the magnitude of the acceleration of the mass a maximum? Position 0 is the relaxed (unstretched) position of the mass.
- AM
- BL
- CR
- Da is constant everywhere
38A mass on a spring oscillates with a certain amplitude and a certain period T. If the mass is doubled, the spring constant of the spring is doubled, and the amplitude of motion is doubled, the period ..
- Aincreases
- Bdecreases
- Cstays the same
39A person swings on a swing. When the person sits still, the swing oscillates back and forth at its natural frequency. If, instead, the person stands on the swing, the natural frequency of the swing is..
- AA) greater.
- BB) smaller.
- CC) unchanged.
40A kid is swinging on a swing with a period T. A second kid climbs on with the first, doubling the weight on the swing. The period of the swing is now...
- Agreater
- Bsmaller
- Cunchanged
41A mass is oscillating back and forth on a spring without friction, as shown. At which position is the kinetic energy of the mass a maximum? Position 0 is the relaxed (unstretched) position of the mass.
- AM
- BL
- CR
- Da is constant everywhere
42A particle-on-a-spring oscillates with an amplitude A, and a period T. If you double the amplitude, the maximum velocity becomes
- Atwice as big
- BB) 4 times as big.
- C1/2 as big.
- DD) 1/4 as big.
- Estays the same
Informationen
- Beschreibung
- INCLUDES EXAM TWO QUESTIONS AND CLICKER QUESTIONS
- Autor
- Abigail Mellon
- Sprache
- English
- Aufrufe
- 16
- Schlagwörter
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