1. The tendency of a body to oppose change in motion is called:
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Chapter 3: Dynamics – I
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2. Bilal is studying contact forces. He understands that contact forces occur when two objects are in physical contact. Which of the following is an example of a contact force?
3. Which instrument is used to measure weight?
4. Qasim is learning about friction. He understands that friction is a force that opposes motion. Which of the following increases friction?
5. Tina is studying mass and weight. She learns that weight varies with location while mass remains constant. What is the weight of a 60 kg astronaut on the Moon where g = 1.6 m/s²?
6. Nadia is learning about force and change in momentum. She understands that force is the rate of change of momentum. If momentum changes at a rate of 10 kg m/s², what is the force?
7. Xia is studying fundamental forces. She learns that the strong nuclear force is the strongest. Where does the strong nuclear force act?
8. Khalid is studying the gravitational field. He learns that gravitational field strength is the force per unit mass. What is the unit of gravitational field strength?
9. Usman is studying conservation of momentum. He learns that in a collision, the total momentum is conserved. In an inelastic collision, what is conserved?
10. Value of gravitational field strength on Earth is approximately:
11. Yara is studying Newton's third law. She learns that action and reaction forces are equal and opposite. If you push a wall with a force of 30 N, what is the force exerted by the wall on you?
12. Newton’s First Law applies to bodies in:
13. Which force is responsible for weight?
14. Rania is studying net force. She understands that net force is the vector sum of all forces. If forces of 8 N and 6 N act at right angles to each other, what is the magnitude of the net force?
15. Tina is learning about impulse. She understands that impulse is force multiplied by time. If the force is doubled and the time is halved, what happens to the impulse?
16. Force that acts without physical contact is called:
17. Which object has greater inertia?
18. Laura is learning about momentum. She understands that momentum is conserved in a closed system. In a collision, what happens to the total momentum of the system?
19. Nadia is studying Newton's laws and conservation of momentum. She learns that in a closed system, the total momentum before a collision is equal to the total momentum after the collision. This is known as:
20. Mass of a body is defined as:
21. Free body diagram represents:
22. Unit of gravitational field strength N/kg is equivalent to:
23. SI unit of weight is:
24. Weight of a body depends upon:
25. Inertia is the property of a body due to which it:
26. Julia is studying the gravitational field. She learns that the gravitational field strength is the force per unit mass. What is the gravitational field strength on Earth's surface?
27. Which instrument is used to measure mass?
28. Xia is learning about mass and weight. She understands that weight depends on the gravitational field. On the moon, the gravitational field strength is 1.6 N/kg. What is the weight of a 10 kg object on the moon?
29. David is studying fundamental forces in nature. He learns that there are four fundamental forces. Which of the following is the weakest fundamental force?
30. Force is a vector quantity because it has: