Engineering Physics I Mock Test 2

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Question 1 of 10

1. A boy of 50kg is standing in a lift moving down with an acceleration 9.8m/s². The apparent weight of the boy is?

50/9.8N

(50×9.8)N

50N

Zero

Question 1 of 10

Question 2 of 10

2. For a body moving in a circular path, the work done by the centripetal force is ___________

Zero

Positive

Negative

Constant

Question 2 of 10

Question 3 of 10

3. A gun fires a bullet of mass 50g with a velocity of 30m/s. Because of this, the gun is pushed back with a velocity of 1m/s. The mass of the gun is?

5.5kg

3.5lg

0.5kg

1.5kg

Question 3 of 10

Question 4 of 10

4. The momentum of a body of mass 5kg is 500kgm/s. Find its kinetic energy?

2.5×10⁵ J

2.5J

2.5×10⁴ J

2×10⁵ J

Question 4 of 10

Question 5 of 10

5. A light spring balance hangs from a hook of the other spring balance and a block of mass Mkg hangs from the former one. Then, which of the following is a true statement?

The scale of the lower one reads Mkg and of the upper one zero

Both the scales read M/2 kg

The reading of the two scales can be anything but the sum of the readings will be Mkg

Both the scales read Mkg each

Question 5 of 10

Question 6 of 10

6. A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it but will break if the mass exceeds 25kg. What is the minimum acceleration with which the monkey can climb up along the rope? (g = 10m/s²)

25m/s²

5m/s²

2.5m/s²

10m/s²

Question 6 of 10

Question 7 of 10

7. Which of the following is an example of inelastic collision?

Collision between two railway compartments

A bullet fired into a wooden block

Collision between two vehicles

Collision between glass balls

Question 7 of 10

Question 8 of 10

8. A person is holding a bucket by applying a force of 10N. He moves a horizontal distance of 5m and then climbs up a vertical distance of 10m. Find the total work done by him?

100J

150J

200J

50J

Question 8 of 10

Question 9 of 10

9. Water falls from a height of 60m at the rate of 15kg.s to operate a turbine. The losses due to friction forces are 10% of energy. How much power is generated by the turbine? g=m/s²

10.2kW

7kW

12.3kW

8.1kW

Question 9 of 10

Question 10 of 10

10. A person sitting in an open car moving at constant velocity throws a ball vertically into the air, the balls falls ____________

Exactly in the hand of the thrower

Outside the car

In the car behind the person

In the car ahead of the person

Question 10 of 10