Question

unit 2: forces & newton’s laws of motion

1. in the picture on the right, one would describe the forces involved as:

a. unbalanced, there is movement towards the right
b. unbalanced, there is movement towards the left
c. balanced, there is no movement
d. balanced, there is movement to the right

1. a tow rope is used to pull a 2200-kg car, giving it an acceleration of 0.96 m/s². what force does

the rope exert?

equation	substitution (plug and chug)	answer & label (# & unit)

1. a 95 kg person falls at a constant velocity through the air while skydiving. what is the net force acting on

the person?

equation	substitution (plug and chug)	answer & label (# & unit)

1. if a force of 255 n is applied to a 40 kg object, what is the acceleration of the object?

equation	substitution (plug and chug)	answer & label (# & unit)

1. if someone isn’t wearing their seatbelt during a high - speed car accident it is possible that they may fly

forward through the windshield.
a. using newton’s first law of motion, explain why this happens.

Explanation:

Question 8

The forces are equal in size, opposite in direction, so they cancel out. No net force means no movement.

Step1: Recall Newton's 2nd Law

$F = m \times a$

Step2: Substitute given values

$F = 2200\ \text{kg} \times 0.96\ \text{m/s}^2$

Step3: Calculate the force

$F = 2112\ \text{N}$

Step1: Define net force for constant velocity

$F_{\text{net}} = m \times a$; constant velocity means $a=0$

Step2: Substitute values

$F_{\text{net}} = 95\ \text{kg} \times 0\ \text{m/s}^2$

Step3: Calculate net force

$F_{\text{net}} = 0\ \text{N}$

Answer:

c. Balanced, there is no movement

---

Question 9