Physics Practice: Laws of Motion (Mock Test 3 - Advanced)
1. The "Law of Inertia" was first formulated by ________ and later used by Newton to develop his first law.
2. When a bullet is fired from a gun, the gun moves backward. This backward motion is called:
3. A force of $5\text{ N}$ acts on a mass of $10\text{ kg}$. The acceleration produced is:
4. Why is it easier to pull a lawn mower than to push it?
5. Gravitational force between two masses is $F$. If the distance between them is doubled, the new force is:
6. The product of force and time for which it acts is called:
7. A body of mass $m$ falls from height $h$. The force acting on it is:
8. Which of the following is not a contact force?
9. The tendency of a body to resist a change in its state of rotation is called ________.
10. Two bodies of mass $1\text{ kg}$ and $4\text{ kg}$ have equal momentum. The ratio of their velocities is:
11. A glass plate breaks when dropped on a marble floor but doesn't break on sand because:
12. The force required to keep a body in circular motion is ________.
13. Newton's second law is often expressed as $F = \Delta p / \Delta t$. Here $\Delta p$ is change in:
14. If the Earth suddenly stops rotating, the value of $g$ at the equator will:
15. To take off, a jet engine ejects gases ________ to gain forward momentum.
16. Static friction is ________ than kinetic (sliding) friction.
17. A cricketer moves his hands backward while catching a ball to:
18. The slope of a Momentum-Time graph gives ________.
19. If the mass of both bodies is doubled, the gravitational force between them becomes:
20. S.I. unit of Impulse is the same as that of ________.