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Which two measurements are needed to determine the speed of an object?
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The amount of force and the direction of the force acting on the box.
Friction is produced when objects slide past one another.
distance and time
gravity
change in direction only
The forces are exerted on different objects so they are not balanced forces.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
Why is the friction force considered to be a contact force?
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The amount of force and the direction of the force acting on the box.
Friction is produced when objects slide past one another.
distance and time
gravity
change in direction only
The forces are exerted on different objects so they are not balanced forces.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
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?
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The amount of force and the direction of the force acting on the box.
Friction is produced when objects slide past one another.
distance and time
gravity
change in direction only
The forces are exerted on different objects so they are not balanced forces.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
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?
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The amount of force and the direction of the force acting on the box.
Friction is produced when objects slide past one another.
distance and time
gravity
change in direction only
The forces are exerted on different objects so they are not balanced forces.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
What do the length and the direction of the arrows in a force diagram represent?
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The amount of force and the direction of the force acting on the box.
Friction is produced when objects slide past one another.
distance and time
gravity
change in direction only
The forces are exerted on different objects so they are not balanced forces.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
How can you tell that forces in a force diagram are unbalanced?
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The amount of force and the direction of the force acting on the box.
Friction is produced when objects slide past one another.
distance and time
gravity
change in direction only
The forces are exerted on different objects so they are not balanced forces.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
Which of the following describes an object moving in a circle steadily?
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The amount of force and the direction of the force acting on the box.
Friction is produced when objects slide past one another.
distance and time
gravity
change in direction only
The forces are exerted on different objects so they are not balanced forces.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
How can you tell that forces in a force diagram are balanced?
You can tell because the opposite forces will be different. Ex. 50 N up and 25 N down
The amount of force and the direction of the force acting on the box.
Friction is produced when objects slide past one another.
distance and time
gravity
change in direction only
The forces are exerted on different objects so they are not balanced forces.
You can tell because the opposite forces will be equal. Ex. 25 N up and 25 N down
Check it!
Match it!
Match it!