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Physics study guide
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Preguntas del test (20)
1A ball is thrown vertically upward with an initial velocity of 29.4 m/s. What is the maximum height reached by the ball?
- A88.1 m
- B44.1 m
- C29.4 m
- D14.7 m
2A rock falls from rest off a high cliff. How far has the rock fallen when its speed is 39.2 m/s?
- A19.6 m
- B44.1 m
- C78.3 m
- D123 m
3A ball of mass m is thrown vertically upward. At the highest point, the ball's acceleration is...
- A0
- Bless than g
- Cg
- Dgreater than g
4A motorist travels 320 km at 80 km/hr and then 320 km at 100 km/hr. What is the average velocity for the entire trip?
- A84 km/hr
- B89 km/hr
- C90 km/hr
- D91 km/hr
- E95 km/hr
5In horizontal projectile motion, the initial velocity...
- Ais always perpendicular to the action
- Bis always parallel to the acceleration
- Cis initially perpendicular to the acceleration then ends up parallel to the acceleration
- Dalternates between perpendicular and parallel to the action
6An object may have...
- Avarying speed without varying velocity
- Bvarying velocity without varying speed
- Czero acceleration with a varying velocity
- Dzero acceleration with a varying speed
7The correct statement for a particle going i a straight line is...
- Aif the velocity and acceleration have opposite sign, the object is slowing down
- Bif the position and velocity have opposite sign, the particle is moving away from the origin
- Cif the velocity is zero at an instant, the acceleration should also be zero at that instant
- Dif the velocity is zero for a time interval, the acceleration is zero at any instant within the time interval
8According to this graph, what happens at 3 seconds?
(assume each box is one unit)
- Athe object its the ground
- Bthe object reaches its highest point
9Considering that the object is moving in a straight line, At what time after t=0 does the object again pass through its initial position?
- Abetween 0 and 1 sec
- B1 sec
- Cbetween 1 and 2 sec
- D2 sec
- Ebetween 2 and 3 sec
10Consider a ball thrown upward from the surface into the air. The acceleration of the ball when it is halfway to its maximum height is...
- Aupwards at 9.8 m/s^2
- Bupwards at 4.9 m/s^2
- Cdownwards at 4.9 m/s^2
- Ddownwards at 9.8 m/s^2
- Ecannot determine without knowing the initial velocity of the ball
11Two cars travel on two parallel of the same straight road. The graphs of their speed versus time is shown to the right. Which of the following is true at the first dotted line?
- ACar Y is behind car X
- BCar Y is passing car X
- CCar Y is in front of car X
- DCar X is accelerating faster than car Y
12The velocity vs time graph for the motion of a car on a straight track is shown. At which time is the car the greatest distance from the origin?
- A10 sec
- B5 sec
- C3 sec
- D0 sec
13The acceleration due to gravity to the surface of the moon is about 1/6 that on the surface of the earth. An astronaut weighs 600 N on earth. The astronauts mass on the moon is almost nearly...
- A600 kg
- B360 kg
- C100 kg
- D60 kg
14A physicist stand in an elevator on a bathroom scale. What does the scale read when the elevator moves downward at 10 m/s ?
- AZero, because there will be no force on the scale to read
- BHigher than when the elevator is at rest, because he s pushing down on the scale harder
- Cthe same as when the elevator is at rest, because the normal force does not change.
- DLower than when the elevator is at rest, because he is moving downwards and therefore, putting less pressure on it
15An 800 kg elvator accelerates downward at 2 m/s^2. The force exerted by the cable on the elevator is...
- A1600 N down
- B!600 N up
- C6400 N up
- D8000 N down
- E9600 N Down
16Two blocks X and Y are in contact on a horizantal frictionless sirface. A 36 N constant focrce is applied to X as shown. The force exerted by Y on X is
- A1.5 N
- B6.0 N
- C29 N
- D30 N
- E36 N
17At a certain time, an object in free fall has velocity 4. m/s in the upward direction. What is the approximate velocity of the object one second later?
- A14 m/s up
- B10 m/s up
- C4.0 m/s down
- D6.0 m/s down
- E10 m/s down
18A force of 10 N stretches a spring that has a spring constant of 20 N/m. The potential energy stored in the spring is...
- A2.5 J
- B5.0 J
- C10 J
- D40 J
- E200 J
19A cart is initially travelling at o.5 m/s along a track. The cart comes to rest after travelling 1 m. The experiment is repeated on the same track with the same cart. This time the cart is moving at 1 m/s. How far does the cart travel before comign to rest?
- A1m
- B2 m
- C3 m
- D4 m
- E8 m
20The period of a mass-spring system undergoing a simple harmonic oscillation is T. If the amplitude is the mass-spring system's motion is doubled, the perod will be
- A1/4 T
- B1/2 T
- CT
- D2T
- E4T
Información
- Descripción
- 8th grade Physics Test sobre Physics study guide, creado por Anika Lanke el 02/01/2019.
- Autor
- Anika Lanke
- Idioma
- English
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