Question

astrophysics cfa fall 2024
name:
period
ms - ps2 - 1: apply newtons third law to design a solution to a problem involving the motion of two colliding objects. directions. choose the best answer and circle it.

1. when an object is at rest, the forces acting on it are said to be...

a. unbalanced
b. moving
c. balanced
d. soft

1. when an object changes its position it is said to be...

a. a force
b. in motion
c. a reaction
d. a collision

1. which situation below is the best example of newtons third law?

a. a baseball flying through the air.
b. a ball being dropped from the roof of a building.
c. a baseball hitting a bat at the same time the bat hits the ball.
d. going forward in your seat after the brakes are quickly applied in the car.

Explanation:

1. When an object is at rest, the forces acting on it are balanced according to Newton's first - law. Unbalanced forces cause a change in motion.
2. When an object changes its position, it is in motion.
3. Newton's third law states that for every action, there is an equal and opposite reaction. A baseball hitting a bat at the same time the bat hits the ball is an example of this law as the bat exerts a force on the ball and the ball exerts an equal and opposite force on the bat.

Answer:

1. C. balanced
2. B. in motion
3. B. A baseball hitting a bat at the same time the bat hits the ball.