Motion and Force + Work and Engergy MCQ's 1

A test from chapter 3 and 4 i.e Motion and Force AND Work and energy of Physics part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. The K.E of a body of mass 1 kg and momentum 2 Ns is equal to:

A) 1J
B) 10 J
C) 5 J
D) 2J

2. A man carries a bucket of water of 1 kg for 10 m then work done by gravity:

A) 10 J
B) 5 J
C) 2.5 J
D) zero

3. A heavy steel ball of mass greater than 1 kg moving with speed 2 m/s collides head on with a stationary ping pong ball of mass less than 0.1g. The collision is elastic. After the collision the ping pong ball moves approximately with speed:

A) 4 m/s
B) 2 m/s
C) 8 m/s
D) -2 m/s

4. A railway train compartment of mass 1600 kg moving with a velocity 5 m/s strikes another of mass 400 kg at rest. If the move together after impact, their common velocity in m/s is

A) 4
B) 2
C) 8
D) -2

5. A rubber bullet and an aluminum (Al) both have the same size, speed and mass. They are fired at a block of wood. Which is most likely to knock the block over?

A) Al bullet
B) Rubber bullet
C) Both
D) same

6. The engine of a car produces acceleration of 4 m/s^2 in the car. If this car pulls another same mass, what will be the acceleration produces in m/s^2

A) 2
B) 4
C) 8
D) 12

7. A person holods a bucket of weight 60 N. He walks 7 m along the horizontal then climbs a vertical distane of 5 m. The work done by the man is:

A) 300 J
B) 420 J
C) 720 J
D) none

8. A constant force of 35 N is used to lift a box to a height of 3 m. This takes 15 seconds with the help of small crane. How much minimum power was the crane using?

A) 7 W
B) 4 W
C) 35 W
D) Insufficient data

9. A body is projected such that the K.E at the top most position is half of the initial K.E. What is its angle of projection with the horizontal:

A) 45 degree
B) 90 degree
C) 60 degree
D) 30 degree

10. A body of mass 5 kg is thrown vertically upwards with 500 J of energy. The maximumheight reached the body is:

A) 10.2
B) 25.5
C) 9.8
D) 51