A push or a pull is a(n)
position
force
friction
gravity
An object that is changing its position is in
speed
friction
velocity
motion
The speed of which of the following objects is affected by gravity?
a soccer ball rolling to the goal
a ball falling after being kicked in the air
a kite in the sky
a cruise ship on the ocean
Any change in the speed or direction of an object’s motion is
velocity
gravity
friction
acceleration
What is changing as the boy rolls?
acceleration
velocity
speed
position
Renee is throwing a ball high into the air and then catching it. What is the effect ofgravity on the ball?
It increases the mass of the ball.
It pulls the ball back to the ground.
It makes the ball’s speed slow down
It makes the ball’s speed remain constant
A measure of an object’s change in position during a certain amount of time is
speed
gravity
friction
velocity
Analyze the line graph. What happens tothe object between Point Y and Point Z?
The object is slowing down.
The object has no velocity.
The object’s acceleration is zero.
The object is speeding up.
The location of an object in relation to another object or place describes
speed
motion
force
position
A force that acts against the direction of an object’s motion and causes it to slow or stop is
motion
speed
gravity
friction
A car traveling down a road approaches a red light. the driver pushes the car’s brakes and the car slows to a stop. what causes the car’s speed to change?
a decrease in friction
an increase in velocity
an increase in friction
a decrease in velocity
A car is stopped at a red light. The light turns green, and the car turns right around a corner. Which property of the car is changing?
direction only
position only
acceleration
speed only
The force that acts to pull all objects down to Earth is
friction
force
gravity
speed
The speed of an object in a particular direction is its
speed
gravity
motion
velocity
Jen is walking her dog at a constant rate. They keep a constant rate as they turn a corner. Why has their velocity changed?
because their direction changed
because their position changed
because their force changed
because their speed changed