Quiz
Physics 105 Quiz - A
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Questions in this quiz (10)
1Starting from rest, a car accelerates in a straight line, achieving speed v in T seconds. Assume that the power delivered by the car’s engine remains constant, how much time does it take for the car to accelerate from v to 2v?
- A2^1.5 T
- B4T
- C2T
- D3T
- E2^0.5 T
2A show, a horizontal force F is pushing a 1.4 kg block up a frictionless 14° incline from point A to point B which are 1.2 m apart. The work exerted by F on the block is 5 J. If the kinetic energy at point B is 4 J, the kinetic energy (in J) at point A is:
- A2.97
- B5.32
- C6.9
- D4.2
- E1.6
3From rest, a 2.3 kg block slides down a frictionless hill and then across a rough patch that has a coefficient of kinetic friction of 0.64. As shown, the velocity of the block after crossing the rough patch is 3.5 m/s directed to the left. What is the vertical height of the hill, h (in m)?
- A0.62
- B0.56
- C0.96
- D0.69
- E0.65
4A square of side L is free to rotate about the point P – at the middle of the lower side – as shown in the figure. All five forces acting on the square have the same magnitude. Rank the five torques, τ, produced by those forces, from the greatest to the smallest.
- Aτ5 , τ4 = τ2 , τ1 , τ3
- Bτ3 = τ4 = τ5 , τ1 , τ2
- Cτ5 , τ2 , τ4 , τ1 , τ3
- Dτ5 , τ4 , τ2 , τ1 , τ3
- Eτ4 , τ5 , τ2 , τ1 , τ3
5A massive crane (assume it is fixed to the Earth) is lifting a mass of 7600 kg. The arm of
the crane is supported at its base at point B by a strong pivot and at its top at point A by a cable. The
arm makes an angle with the horizontal of 40 and the cable makes an angle 30 with the horizontal as
well. The arm is 12.0 m long. The mass is lifted from a point on the arm 0.52 m from the end point A.
Assume that the mass of the arm is small enough to ignore, find the tension in the cable
- A315 KN
- B630 KN
- C155 KN
- D900 KN
- E50 KN
6Assume that blood flows into the aorta at 1.0 m/s for 0.5 s, from which it flows then through an artery at 0.6 m/s for another 0.5 s. The average speed (in m/s) of the blood through the total time elapsed is:
- A1.0
- B0.8
- C1.6
- D0.6
- Ezero
7A 4 kg steel ball of the density of ( 7.8*10^3 kg/m^3 ) suspended from a rope is partially immersed in water
of the density of (10^3 kg ⁄ m^3 ). If one-third of the ball’s volume is below the surface of the water, the tension (in N) in the rope is:- A35.8
- B37.5
- C40.9
- D42.6
- E39.2
8The schematic diagram for a hydraulic lift shows two pistons in a container filled with a fluid ( of density of (750 kg/m^3 ). The larger piston on the right has a diameter of 13 cm and a mass of 3.6 kg , while the piston on the left has a diameter of 5.1 cm and a mass of 2.3 kg. The height difference h (in m) between the two pistons is:
- A0.02
- B0.93
- C1.1
- D1.74
- E7.23
9Consider that your average blood pressure is (1.33 N/cm^2) and your blood flow rate is (105 cm^3/s ) . The energy your heart does provide in one day is used to lift a 72 kg box vertically to a height h. Calculate the height h (in m).
- A308
- B3
- C12
- D94
- E171
10The density of salt water is 1.02 greater than the density of fresh water. A box floats in static equilibrium in both fluids. Which of the following statements is correct?
- AThe volume of the displaced water is the same in both cases.
- BBuoyant force is the same in both
- CBuoyant force exereted by fresh water is greater than that by salt wate
- DBuoyant force exereted by salt water is greater that that by fresh water.
- ENone of the statements is correct.
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- Quiz on Physics 105 Quiz - A, created by Fuad abualhajj on 27/11/2021.
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- Fuad abualhajj
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