Test- Forces

Question 1

2) 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 1

The escaping water exerts an equal and opposite force on the hose.
(Pg. 25)

Question 2

4) the upward force on an object falling through the air is…

Answer 2

Inertia (pg. 27)

Question 3

9) 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’ve been with the same force applied to it would be
a) smaller
b) larger
c) the same
d) not enough Info to determine

Answer 3

b) larger

Question 4

15) what is the weight of the box if it has a mass of 25kg and a force of 300N?

Answer 4

245N

Question 5

18) a man weighing 800N is standing on a chair. In order to support the man, what force is the chair exerting?

Answer 5

800N up

Question 6

19) what is the net force of a block that has a force of 3N to the right and a force of 5N to the right.

Answer 6

2N left

Question 7

22) an object that is falling freely has a constant what?

Answer 7

Acceleration (pg.28)

Question 8

28) the tendency of an object to resist changes in motion

=?

Answer 8

Inertia (pg.27)

Question 9

29) the attraction any two objects have on one another

=?

Answer 9

Gravity

Pg.27

Question 10

38)

C) when does terminal velocity occur?

Answer 10

When the air resistance is equal to gravity

Question 11

In given, what pieces of information do you need to know?

Answer 11

The unit, the number, and what it is.

Ex: M = 32kg