Physics Practice: Force and Pressure (Mock Test 4 - Expert)
1. In a laboratory experiment, a student observes that a straw rubbed with silk attracts another straw rubbed with silk. This expert observation demonstrates:
2. A block of wood weighs $20 \text{ N}$ in air. When floating in water, the net force acting on it is:
3. Why do deep-sea fish sometimes "burst" when they are brought to the surface quickly?
4. If the force applied to an object is tripled and the area of contact is halved, the new pressure will be:
5. Which of the following experimental observations proves that "Liquid pressure increases with depth"?
6. A person standing on one leg exerts ________ pressure on the ground compared to when standing on two legs.
7. Pascal's Law states that pressure applied to an enclosed fluid is transmitted:
8. In a vacuum, a feather and a coin dropped from the same height will fall together because:
9. Magnesium wheels in racing cars are designed to be "light-weight" to reduce:
10. A barometer reading falls suddenly. This is often an expert indication of:
11. Force is defined as the product of mass ($m$) and ________ ($a$).
12. Why are the soles of football shoes (cleats) provided with spikes?
13. Liquid pressure acts in which direction(s)?
14. What is the standard value of atmospheric pressure at sea level?
15. An object floats when the buoyant force is ________ its weight.
16. The SI unit of Moment of Force is:
17. Which of the following is NOT a method to increase friction?
18. The center of gravity of a uniform circular ring is located:
19. Why does a sharp needle pierce the skin easily but a finger does not, even with more force?
20. Magnetic force is a ________ force and Gravitational force is a ________ force.
