Force test

Question 1

1. 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 1

larger

U6 c2 pg 11

Question 2

6. What is the weight of the box in the picture to the right?
   (The box has a mass of 26 kg and has a net force of 300 N to the right)

Answer 2

245 N

U6c3 pg 23

Question 3

8. Consider a watermelon 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 3

The water melon falls at a constant velocity.

U6C3 pg 21

Question 4

13. An object that is falling freely has a constant what?

Answer 4

Acceleration

U6c2 pg11

Question 5

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 coin falls into the cup rather than moving with the card?

Answer 5

Inertia

U6c3 pg 20

Question 6

19. An object in moving with no unbalanced forces acting on it will…..

Answer 6

Continue to move in its path at a constant speed

U6c3 pg 20

Question 7

20. The upward force on an object falling through the air is….

Answer 7

Air resistance

U6c3 pg 21

Question 8

37. Rank the following objects from least momentum to the most momentum

Answer 8

1. Parked car
2. Falling feather
3. fast car

U6C3 pg 23

Question 9

38b. What speed will the skydiver eventually reach? What is this speed called?

Answer 9

55 m/s or 118.06 mi/hr

U6C3 pg 22

Question 11

38c.Why does this occur

Answer 11

Gravity+air resistance become balanced
falling human at a constant velocity

U6C3 pg 22

Question 11

Bonus.Explain the factors that affect the amount of friction and list the 3 types of friction.

Answer 11

Static
Sliding
Rolling

Roughness of surface. Force applied to surfaces amt. of surface area
U6C3 pg 21