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A soccer player kicks a ball. According to Newton’s third law of motion, the player’s foot exerts a force on the ball. The ball exerts a force on the foot. Why don’t the forces cancel out to result in a net force of zero?
change in direction only
There is a net force of 25 N to the left. The box will move to the left.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
meters
Friction is produced when objects slide past one another.
gravity
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The forces are exerted on different objects so they are not balanced forces.
How can you tell that forces in a force diagram are unbalanced?
change in direction only
There is a net force of 25 N to the left. The box will move to the left.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
meters
Friction is produced when objects slide past one another.
gravity
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The forces are exerted on different objects so they are not balanced forces.
Which unit would be most appropriate to measure the length of the bowling lane?
change in direction only
There is a net force of 25 N to the left. The box will move to the left.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
meters
Friction is produced when objects slide past one another.
gravity
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The forces are exerted on different objects so they are not balanced forces.
Why is the friction force considered to be a contact force?
change in direction only
There is a net force of 25 N to the left. The box will move to the left.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
meters
Friction is produced when objects slide past one another.
gravity
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The forces are exerted on different objects so they are not balanced forces.
Which of the following describes an object moving in a circle steadily?
change in direction only
There is a net force of 25 N to the left. The box will move to the left.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
meters
Friction is produced when objects slide past one another.
gravity
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The forces are exerted on different objects so they are not balanced forces.
If a ball has 50 N of force pushing from the left and 25 Newtons of force pushing from the right, what is the motion of the box?
change in direction only
There is a net force of 25 N to the left. The box will move to the left.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
meters
Friction is produced when objects slide past one another.
gravity
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The forces are exerted on different objects so they are not balanced forces.
How can you tell that forces in a force diagram are balanced?
change in direction only
There is a net force of 25 N to the left. The box will move to the left.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
meters
Friction is produced when objects slide past one another.
gravity
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The forces are exerted on different objects so they are not balanced forces.
A skydiver jumps out of a plane. She falls downward at a very fast speed. When she opens her parachute, she slows down. What force pulled the skydiver to the ground?
change in direction only
There is a net force of 25 N to the left. The box will move to the left.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
meters
Friction is produced when objects slide past one another.
gravity
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The forces are exerted on different objects so they are not balanced forces.
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