What does one need to know to be able to calculate an object’s acceleration?

1. Given the formula, (average speed =total distance divided by total time), what is the bird’s average speed if it flies 150 m for 10 s, then 200 m for 10 s, and then 100 m for 5 s?

2. Given the formula (F=ma), how much force is needed to accelerate a 62 kg rider and her 300 kg scooter at 6 m/s/s?

3. If the driver of a car suddenly makes a sharp turn, why will the passenger slide to the other side of the car?

4. Use Newton’s second law of motion (F=ma) to calculate the mass of an object when the force of 28 N accelerates the object 3 m/s/s.

5. What does one need to know to be able to calculate an object’s acceleration?

6. Because of projectile motion, where would one aim when shooting at a target?

7. In an action film, the hero is running forward along the top of a train that is traveling at 30 m/s. He’s chasing a villain at a rate of 6 m/s toward the front of the train. What is the hero’s resultant velocity during the chase?

8. If an astronaut throws a ball in space, when will the ball stop?

9. Inertia is used when explaining which one of Newton’s laws?

10. Which of the following objects have the LEAST inertia:

11. What causes a person to fall backward against the seat when an airplane takes off?

12. When the brakes are suddenly applied to a moving vehicle, what causes a person to move forward in his/her seat?

13. What does Newton’s second law of motion state about an object’s acceleration?

14. A student kicks a 0.7 kg ball. She then kicks a 70 kg rock with the same force. What can be said about the acceleration of the ball as compared to the rock?

15. What force is necessary to accelerate a 1,250 kg car at a rate of 40 m/s/s (F=ma)?

16. If a force of 45N acts on an object with a mass of 12 kg, what is its acceleration? (F=ma)

17. A student is pushing a 100 kg man in a chair with all the strength she can generate. How could she increase the acceleration of the man?

18. According to Newton’s third law of motion, when a force is exerted on an object what does the second force produce?

19. A man is pushing down with a force of 40 N in on a chair. How much force is the chair exerting?

20. If an astronaut uses a jet of nitrogen to maneuver in space, what law is BEST illustrated as the nitrogen is expelled?

21. What is the term for slanted surface used to raise an object?

22. How do gases and air flow?

23. How do you describe the input force and distance of a screw?

24. A student wants to lift a 70 kg box. She has four pulleys and a 18 m rope. Which arrangement would have the greatest mechanical advantage?

25. Two bicycle ramps have the same height. The first ramp is twice as long as the second ramp. Why does the first ramp have a better mechanical advantage?

26. A construction worker is given four hammer of different lengths, (20cm, 25 cm, 30 cm, & 45 cm) which hammer would give him the best mechanical advantage?

27. What type of simple machine is a jar lid?

28. What would happen if astronauts, who wear pressurized suits in space, took their suits off?

29. In what direction is fluid pressure always directed?

30. What type of friction is air resistance known as?

31. A student is given a 10 kg rock, four boards and a fulcrum to make a lever. Which board would have the greatest mechanical advantage if the fulcrum is in the same place relative to the load?

32. What type of friction is responsible for a car’s tires wearing away, making them smooth, after several km’s

33. Why do hydraulic devices use liquids instead of gases?

34. What is the pressure exerted on the floor by a 5,000 N crate with an area of 10m2? (Pa = F/a)

35. Air is made up of gases, it can be called a fluid. Why is an airplane able to fly within this fluid?

36. A syringe with air is stoppered. It is then pushed in. what can be said of the original air pressure as compared to the final

37. What is the density of a 50 cm3 sample of liquid with a mass of 300 g? (D = m/V)

38. A ball falls from a height of 6 meters in the absence of air resistance. When does the ball have the GREATEST kinetic energy and the LEAST potential energy?

39. A vehicle is traveling at 25 km per hour. It increases its speed to 60 km per hour. What happens to its kinetic and potential energy?

40. Two objects have the same masses. One object is traveling vertically 25 km/s. The other object is on the floor and is traveling horizontally at a speed of 25 km/s. Which one has the greatest kinetic energy and the least potential energy?

41. A student is observing traffic and sees four vehicles: a large truck traveling 60 m/s, a large truck traveling 30 m/s, a small car traveling 40 m/s and a small care traveling 25 m/s. which vehicle has the MOST kinetic energy?

42. Why do you not notice atmospheric pressure on your body?

43. By increasing the speed of an object, what happens to it potential energy?

44. What is the SI unit for energy?

45. What is the net force of a combined force of 12 N north with a force of 4 N south?

46. What is the net force on an object if one force has a magnitude of 10 N and is directed toward the north and the other has a magnitude of 5 N directed toward the south?

47. What is the resultant velocity if a passenger on a bus traveling 20 m/s east decides to move from the front of the bus to the back walking at a rate of 2 m/s?

48. What is the SI Unit for speed?

49. To open a bottle, One would apply a force of 90 N to the bottle opener. The bottle opener applies a force of 225 N to the bottle cap. What is the mechanical advantage of the bottle opener?

50. What type of simple machine is an inclined plane with one or two sloping sides?