Test- Unit 6 Force

Question 1

6. What is the weight of the box in the picture to the right?

Answer 1

D. 245 N

unit 6 concept 3 pg. 23

Question 2

8. Consider a water melon that starts from rest and is dropped straight down from a tall building. Air resistance can be ignored. Which statement about the watermelon’s motion is FALSE?

Answer 2

A. The watermelon falls with a constant velocity.

unit 6 concept 3 pg. 23

Question 3

15. In the picture to the right, if the card were quickly pulled off the cup like the arrow suggests, what property would explain why the card falls into the cup rather than moving with the card?

Answer 3

C. inertia

unit 6 concept 3 pg. 20

Question 4

17. A firefighter feels the hose pushing backwards onto him as he uses it to put out a fire. What is the most likely cause of this?

Answer 4

D. The escaping water exerts an equal and opposite force on the hose.
unit 6 concept 3 pg. 23

Question 5

21. The relationship among mass, force, and acceleration is explained by _______.

Answer 5

C. Newton’s 2nd law of motion

unit 6 concept 3 pg. 22

Question 6

23. The size of the gravitational force between two objects depends on their _____.

Answer 6

C. masses and the distance between them.

unit 6 concept 3 pg. 22

Question 7

33. Why does someone not wearing a seatbelt in a car fly forward when the car stops suddenly? Make sure to include which law explains this.

Answer 7

Because objects in motion resist a change in motion , due to inertia. The 1st law.
unit 6 concept 3 pg.30

Question 8

46. What does velocity always include?

Answer 8

Speed and direction

Unit 6 concept 1 pg. 3