FREE Gaokao Physics: Mechanics and Kinematics Questions and Answers

Question 1

A car starts from rest and accelerates uniformly on a straight road. It travels a distance x in the first 2 seconds. What is the distance it travels in the subsequent 2 seconds (from t=2s to t=4s)?

Accepted Answer

3x

Answer

x

Answer

2x

Answer

4x

Question 2

An object of mass 2 kg rests on a horizontal surface with a coefficient of kinetic friction μ=0.2. A horizontal force F=10 N is applied. What is the acceleration of the object? (Assume g = 10 m/s²)

Accepted Answer

3 m/s²

Answer

5 m/s²

Answer

4 m/s²

Answer

0 m/s²

Question 3

A small ball is released from rest at the top edge of a smooth hemispherical bowl of radius R. What is its speed when it reaches the bottom of the bowl?

Accepted Answer

√(2gR)

Answer

√(gR)

Answer

gR

Answer

2gR

Question 4

A block of mass 2 kg starts from rest and slides 4 m down a rough inclined plane with an angle of 30°. Its final speed is 5 m/s. How much work is done by the friction force? (Assume g = 10 m/s²)

Accepted Answer

-15 J

Answer

-25 J

Answer

15 J

Answer

-40 J

Question 5

An object is thrown horizontally with an initial velocity of 15 m/s from the top of a cliff. It lands at a horizontal distance of 45 m from the base of the cliff. How high is the cliff? (Ignore air resistance, g = 10 m/s²)

Accepted Answer

45 m

Answer

30 m

Answer

75 m

Answer

90 m

Question 6

A car of mass 1000 kg travels at a constant speed of 20 m/s over a convex bridge with a radius of curvature of 100 m. What is the normal force exerted by the bridge on the car at the highest point? (Assume g = 10 m/s²)

Accepted Answer

6000 N

Answer

10000 N

Answer

4000 N

Answer

14000 N

A car starts from rest and accelerates uniformly on a straight road.It travels a distance x in the first 2 seconds.What is the distance it travels in the subsequent 2 seconds (from t=2s to t=4s)?

A car starts from rest and accelerates uniformly on a straight road.
It travels a distance x in the first 2 seconds.
What is the distance it travels in the subsequent 2 seconds (from t=2s to t=4s)?