Which situation describes a non-contact force changing the speed of an object?(1 point)
Responses
a bicycle accelerating as the rider pedals more quickly
a bicycle accelerating as the rider pedals more quickly
a drawer opening when a user pulls the handle
a drawer opening when a user pulls the handle
a gust of wind blowing a leaf away
a gust of wind blowing a leaf away
a ball accelerating as it rolls down a hill
a ball accelerating as it rolls down a hill
In which situation would the momentum of a moving object increase?(1 point)
Responses
A force acting in the direction of the object’s motion is removed from the object.
A force acting in the direction of the object’s motion is removed from the object.
A new force acts on the object, opposing the object’s motion.
A new force acts on the object, opposing the object’s motion.
Two forces of equal magnitude act on the object in opposite directions.
Two forces of equal magnitude act on the object in opposite directions.
A force acting in the direction opposite the object’s motion is removed from the object.
A force acting in the direction opposite the object’s motion is removed from the object.
When you trip, your foot stops, but your body continues to move forward. Which statement best explains why this happens?(1 point)
Responses
Newton's Second Law of Motion pushes your body forward after your foot stops.
Newton's Second Law of Motion pushes your body forward after your foot stops.
The unbalanced force that stops your foot pulls your body forward.
The unbalanced force that stops your foot pulls your body forward.
An unbalanced force pushes your body forward.
An unbalanced force pushes your body forward.
An unbalanced force stops your foot but does not act on the rest of your body.
An unbalanced force stops your foot but does not act on the rest of your body.
A bowler throws a ball down the lane toward the pins. The ball reaches the pins and slowly moves through them, knocking down the center pins but leaving the end pins standing. The bowler wants the ball to reach all the pins. Which changes should the bowler make so that the ball has a greater acceleration?(1 point)
Responses
The bowler should choose a ball with less mass or throw the ball with more force.
The bowler should choose a ball with less mass or throw the ball with more force.
The bowler should choose a ball with less mass or throw the ball with less force.
The bowler should choose a ball with less mass or throw the ball with less force.
The bowler should choose a ball with more mass or throw the ball with less force.
The bowler should choose a ball with more mass or throw the ball with less force.
The bowler should choose a ball with more mass or throw the ball with more force.
The bowler should choose a ball with less mass or throw the ball with more force.
In which situation does the reactive force between two colliding objects cause a physical change?(1 point)
Responses
two bumper cars at an amusement park colliding, causing both cars to change direction
two bumper cars at an amusement park colliding, causing both cars to change direction
a swing hitting another swing, causing the second swing to move away
a swing hitting another swing, causing the second swing to move away
the exhaust from a rocket thrusting the rocket away from the ground
the exhaust from a rocket thrusting the rocket away from the ground
a baseball player swinging a bat and hitting a baseball, causing the bat to shatter