Two boys are pulling the rope with the same amount of force. What will happen?
They will not move at all
20
Jupiter has about 317 times more mass than Earth. What can you conclude about their gravity from this fact?
Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
25
______ is a contact force that is applied to an object by a person or another object.
applied force
10
A child is riding her bike on a straight path. A friend applies a force on the bike from her back. How will the motion of the bike change?
The bike will go faster
25
Four toy cars were pushed on a surface with the same force. They traveled a distance before coming to a stop. The graph shows the distance and time plotted for the motion of the four toy cars. Which car is the fastest car?
toy car 1 traveled fastest
20
______ is a contact force that resists the sliding motion of two surfaces that are touching.
friction
10
______ is a noncontact force. It is an attractive force that exists between all objects that have mass.
Gravity
10
The diagram below show the forces acting on a soccer ball. In which of the diagrams will the ball remain motionless? (W, X, Y, or Z?
W
15
In the diagram below, a girl sits on a sled and slides down a hill of snow. Which arrow represents the force of friction opposing the motion of the sled down the hill?