Question

A car that is traveling west at a constant rate has ____ (1 point)

Answer 1

While playing her soccer game, Samantha runs down the field at 10 meters per second. She has a constant speed and does not change direction. What is Samantha’s acceleration?(1 point)
The acceleration is 10 m/s^2 because her velocity did not change.
The acceleration is 0 m/s^2 because her velocity increased.
The acceleration is 10 m/s^2 because her velocity increased.
The acceleration is 0 m/s^2 because her velocity did not change.

Answer 2

Two forces act on an object. One force has a magnitude of 10 N directed north, and the other force has a magnitude of 2 N directed south. What is the net force on the object?(1 point)
8 N south
8 N north
12 N south
25 N north

Answer 3

An object at rest remains at rest. An object in motion remains in motion unless acted upon by an outside force. This describes which of Newton’s Laws of Motion?(1 point)
First and Third Laws of Motion
Second and Third Laws of Motion
Second Law of Motion
First Law of Motion

Answer 4

Suppose 25 children who weigh the same are playing a game of tug-of-war. Five children pull with 10 newtons of force, while ten children pull with 15 newtons of force in the opposite direction. How can one determine the net force on the rope?(1 point)
The newtons are in the same direction, so the newtons can be multiplied.
The forces are in the same direction, so the newtons can be added.
The forces are in opposite directions, so the newtons can be subtracted.
The forces are in opposite directions, so the newtons can be divided.

Answer 5

Which example shows an object acted on by two balanced forces?(1 point)
A baseball rolling to a stop
A car moving at a constant speed in a constant direction
A snowflake landing on a roof
A skateboard rolling down a hill with increasing speed

Answer 6

Speed, unlike acceleration or velocity, does NOT specify _______.(1 point)
Direction
Time
Mass
Distance