Unit One Force Test

Question 1

6. The relationship among mass, force, and acceleration is explained by what?

Answer 1

Answer: Newton’s 2nd law

Reference: concept 1

Question 2

10. A baseball player swings his bat and misses the ball but hits a fly that was hovering over home plate the acceleration of the fly compared to what the acceleration of the ball would have been with the same force applied to it would be

Answer 2

Answer: Larger

Reference: concept 1

Question 3

13. When two forces on the same object are equal and opposite, these forces are called

Answer 3

13. Balanced

Reference: concept 1

Question 4

22. An object that is falling has a constant what?

Answer 4

Answer: Acceleration

Reference: concept 1

Question 5

25. An object will move at a constant velocity unless has an unbalanced force acts opponent it

Answer 5

Answer: Newton’s 1st law

Reference: concept 1

Question 6

31. A net force acting on an object causes the object to acceleration in the direction of the net force

Answer 6

Answer: Newton’s 2 law

Reference: concept 1

Question 7

33. Why does someone not wearing a seatbelt in a car fly forward when the was stops suddenly? Make sure to include the laws that explain this.

Answer 7

Answer: b/c objects in motion resist change in motion, due to inertia, 1st law

Reference: concept 1

Question 8

34. Why does it take more effort to make a bowling ball accelerate 25 m/s2 than to make a tennis ball accelerate 25 m/s2?
    Make sure to include which law explains this.

Answer 8

Answer: b/c the bowling ball has more mass thus needs a greater force to accelerate it 2nd law

Reference: concept 1

Question 9

36. Rank the following objects from least to most inertia.

Answer 9

Answer: pencil, science textbook, truck

Reference: concept 1

Question 10

38. Answer the following questions according to the data table of a sky divers motion to the right.

C.why does this occur?

Answer 10

Gravity and air resistance become balanced. Falling human falls at a constant velocity.

Reference: concept 1

Question 11

39.put N

Answer 11

Not in kg it’s in N

Question 12

40. What is the first thing you do in a problem

Answer 12

Add a given

Question 13

42. If a 53kg Boulder falls off a cliff, what is the force with which it will hit the ground?

Answer 13

Answer: f= 519.4 N

Reference: concept 1

Question 14

43. A man and his bike are 95kg. His instantaneous speed at one point is 14m/s. The next time his speed is checked he is going 28m/s. If the second speed was taken 7 seconds later, what force must the man have givin his bike to change the speed? What was the bicyclist’s final moment?

Answer 14

Answer: pf = 2,660kg* m/s

Reference: Concept 2

Question 15

44. What is the first thing you do in a problem

Answer 15

Add a given(s)

Question 17

46. What should you always add in your problem

Answer 17

Answer with a correct unit

Question 18

45. What should you always add in a problem

Answer 18

Your work