Physics Revision

General Revision Questions

1. What is physics and what are its main branches?
2. What is the difference between scalar and vector quantities? Give examples of each.
3. Define speed and velocity. How are they different?
4. What is acceleration and how is it calculated?
5. State Newton’s First Law of Motion.
6. State Newton’s Second Law of Motion and provide its formula.
7. State Newton’s Third Law of Motion and give an example.
8. What is the difference between mass and weight?
9. What is gravity and how does it affect objects on Earth?
10. Define work in physics and provide the formula used to calculate it.
11. What is energy and what are its main forms?
12. Explain the difference between kinetic energy and potential energy.
13. What is the law of conservation of energy?
14. Define power and provide its formula.
15. What is momentum and how is it calculated?
16. Explain the law of conservation of momentum.
17. What is friction and what are the different types of friction?
18. What is pressure and how is it calculated?
19. Describe the difference between solids, liquids, and gases in terms of particle motion.
20. What is temperature and how is it different from heat?
21. Explain how heat is transferred through conduction, convection, and radiation.
22. What is a wave and what are its basic properties?
23. What is the difference between transverse and longitudinal waves?
24. Define frequency and wavelength.
25. What is sound and how does it travel?
26. What is light and what are its main properties?
27. Explain reflection and refraction of light.
28. What is an electric current?
29. What is voltage and how is it measured?
30. State Ohm’s Law and provide its formula.
31. Resonance occurs in a tube of air closed at one end when the tube is 16.8 cm long and the frequency is 500 Hz. The speed of sound is _____ m/s. Round and record your three-digit value.
32. Refer to multiple-choice question 1. The speed of the satellite in scientific notation, is b x 10w m/s. The value of b is _____. Round and record your three-digit value.
33. Snoopy is flying his Sopwith Camel in a vertical loop. He hopes to have a radius of 720 m. The minimum speed the plane must have in order to complete the loop (and not fall out of the sky) is _____ m/s. Round and record your three-digit value.
34. A 12.4 kg lead sphere is placed near a 45.7 kg lead sphere. If the gravitational force between the two is 8.95 x 10-8 N, the distance between the centers of the spheres is _____ m. Round and record your three-digit value.
35. Two forces act on an object. A 110 N force pull toward 127o, a 98.0 N force pulls at 310o. Ignoring friction, what is the magnitude and direction of the net force acting on the object?
36. A boat that can travel at 2.5 m/s is on river flowing at 2.0 m/s. Determine the velocity of the boat relative to the shore if the boat is aimed straight across the river.
37. If the river in question 7 is 112 m wide, how much time is needed to cross the river?
38. A ball is thrown horizontally at 10.0 m/s from the top of a 90.0 m tall building. Calculate the distance from the base of the building that the object will hit the ground.
39. A 1.5 kg object is given a push so that its initial velocity is 1.4 m/s west. The object slides to stop after moving 0.25 m. What is the coefficient of friction?
40. Three forces act on an object. Force A has a magnitude of 80.0 N and acts at 60.0^o. Force B is 70.0 N at 0.00^o. Force C is 40.0 N at 315^o. What is the magnitude and direction of the resultant?
41. A 1500 kg car is moving at 60 km/h when its brakes are applied and the car skids to a stop. If the force of friction is about 1.1 x 104 N, how far does the car travel before coming to a stop?
42. A child is pulling her 8.2 kg wagon with a force of 20 N. If the handle of the wagon is at an angle of 36o to the horizontal, determine the acceleration of the wagon.
43. A gravitational force of 1.45 x 10^-7 N acts between two objects when they are 1.56 m apart. If one mass is 3.00 kg, the mass of the other object is ____ kg.
44. A satellite is in orbit above Earth at a distance of 7.15 x 10⁶ m from the centre of Earth. Calculate the period of its orbit.
45. Determine the weight of a 50.0 kg person on the surface of Ganymede (m=1.48 x 10²³ kg, r = 2634 km), one of the moons of Jupiter.