PHY101 Quiz 1 2021

Phy101 Searching file

by Orange Monkey Team

1. According to the equation of work, when a boy sits in one place and studies for the whole night, he does

No work

2. When the velocity of an aeroplane is doubled, the momentum_________

Increase uniformaly

3. The momentum of an object at a given instant is independent of its. Acceleration

Q4. What sort of energy does flying bird possess?

Both potential and kinetic energy · 5. The acceleration of projectile in x-direction: 0ms-2 · 6. The projectile path is also known as its Trajectory

7. If force of friction is negligible, then acceleration of two freely falling objects of different masses is:

Smaller acceleration for smaller mass

Q8. Which of the following statement/s is/ are true?

• The weight of a man on the moon is smaller than that on the earth

• The mass of a man is the same on both the moon and the earth

• We cannot determine our own mass in the outer space because there is no gravity

1 only

9. When the momentum of a body is doubled, its kinetic energy___________

Becomes four times its initial energy · 10. Which of the following statement is true · Gravity is necessary to measure both weight and mass

11. It is easier to walk on the concrete road than on ice because

the friction between the ice and the feet is less than that between the concrete and feet

12. Pre-second refers to the dimensions of physical quantity Velocity

13. If the mass of moving objects is doubled then its K.E becomes 4 times

14. The slope of a velocity-time the graph at any point may be identified with

Average acceleration · 15. K.E can be defined as the dot product of · Mass and velocity

16. A wheel of radius 50cm having the angular speed of 5 rad/s will have linear speed in m/s

2.5

19. Lighter objects always reach the ground later than heaver objects 2 and 3 only

17. In ______ object returns to its original position if displaced slightly Stable equilibrium

18. Newton first law is also called______

Law of inertia

19. A mosquito’s buzz is often rated with a decibel rating of 40 db _

20. The product of force and time is called change in ______ Momentum or impulse…. Both are correct
21. People try to keep the _______ over their feet n order to feel stable Center of gravity
22. If the magnitude of force applied is incorrect the work done will____ be increased unit of distance is