7.7 Force and Motion

a series of laws developed by Isaac Newton that describe the relationship between force and motion

• Newton's Laws of Motion
• Velocity
• Net Force
• Unbalanced Forces

the combination of all of the forces acting on an object

• Net Force
• Balanced Forces
• Unbalanced Forces
• Velocity

a set of forces on an object that cancel one another out so there is no overall force on that object; the combined force is the same as zero force

• Net Force
• Balanced Forces
• Unbalanced Forces
• Velocity

a set of forces exerted on an object that change the motion of that object; the combined force has size and direction

• Net Force
• Balanced Forces
• Unbalanced Forces
• Velocity

the speed of an object in a particular direction

• Net Force
• Balanced Forces
• Unbalanced Forces
• Velocity

Which example involves balanced forces?

• a rocket launching into space
• a hanging picture that is stationary
• a car accelerating at a green light
• ice melting in a glass

Which scenario is an example of unbalanced forces acting on an object?

• a book lying on a table without moving
• car moving at a constant speed on a straight road
• a tug-of-war game where both teams are equally matched
• a person starting to jog from a stationary position

What will happen to a ball rolling on the ground if no additional forces act upon it?

• It will keep rolling at the same speed forever.
• It will slow down due to friction
• It will change direction.
• It will speed upon 4

An experiment was performed with a toy car moving along a straight track. The times and distances were collected and graphed below. What was the average speed of the toy car?

• 2 m/s
• 5 m/s
• 5 km/h
• 10 m/s

Which student's explanation of the cheetah's average speed is correct?

• Ana
• Ben
• Both Students
• Neither Student