Force and Motion 1
Force and Motion 2
Force and Motion 3
Force and Motion 4
Force and Motion 5
100
What is a PUSH or PULL on an object?
Force
100
What are two contact forces?
applied
friction
tension
normal
100
What non-contact force pulls a ball back to earth?
Gravity
100
What is the missing force?
F frict (frictional force)
100
Describe the action and reaction forces when you sit on a chair
downward force from you to the chair
upward force from the chair to you
200
If these boys are each pulling with the force of 10 newtons. What will happen?
The boy in blue will win.
They will not move at all.
The boy in red will win.
They will not move at all. Balanced
200
Which word means a change in velocity?
Acceleration
200
Calculate the Net Force.
60 N to the right
200
The force that acts directly against the direction of motion.
What is friction?
200
A football gets punted and travels 90 meters in 9 seconds, what is the football’s speed?
10 m/s
300
Which of the following statements is true?
Balanced forces cause a change in velocity.
Unbalanced forces cause a change in velocity.
Forces do not affect the change in velocity.
Unbalanced forces cause a change in velocity.
300
You push a friend sitting on a swing. She has a mass of 50 kg and accelerates at a rate of 4 m/s2. Find the force?
200 N
300
Is a boy going at a constant speed on the carousel accelerating?
yes, because he is changing direction
(acceleration is any change in speed and/or direction)
300
Forces on an object that is moving at a constant speed (or at rest) need to be ____________.
balanced
300
A golf ball rolls down a hill on the golf course. Which statement best describes how friction affects the motion of the golf ball?
A. Friction causes the golf ball to roll forwards and backwards.
B. Friction decreases how far the ball rolls.
C. Friction increases how fast the ball rolls.
D. Friction causes the ball to bounce.
B. Friction decreases how far the ball rolls.
400
How do you calculate speed?
Speed = distance / time
400
You want to move two boxes. Which sentence correctly describes the force needed to move the boxes?
More force is needed to move the lighter box.
More force is needed to move the heavy box.
More force is needed to move the heavy box.
400
Which object would require the most force to move?
a tennis ball
a baby
a car
a cell phone
car, because it has the most mass
400
A soccer ball is at rest on the ground. When a force is applied to it, it moves. If larger force is applied to it, how will the motion of the soccer ball change?
A. The ball will move less distance with less speed.
B. The ball will move farther with less speed.
C. The ball will move farther with more speed.
D. The ball will move less with more speed.
C. The ball will move farther with more speed.
400
A ball is sitting loose in the moving wagon pictured below. If the wagon stops suddenly, the ball will
roll forward in the wagon and fall off
500
Is gravity a contact or non-contact force?
non-contact. You don't have to be touching the surface of the Earth in order to get pulled towards it.
500
A car and semi (truck) are travelling down the road at the same speed. They both slow down with the same stopping force. Which statement best explains why the semi needs more distance than the car to stop.
A. The semi is longer.
B. The semi has larger wheels.
C. The semi has more mass.
D. The semi has less mass.
C. The semi has more mass.
500
The air blowing up on an air hockey table causes the puck to...?
A. Air balances the forces and makes the puck move faster.
B. Air causes the puck to slow down.
C. Air causes the puck to have less mass and travel farther.
D. Air reduces friction and allows the puck to move easily.
D. Air reduces friction and allows the puck to move easily.
500
A heavy box sits on the floor with the force of 3 N pushing left and the force of 5 N pushing right. Gravity is pulling the box down to the floor with 2 N and the force of the floor is pushing the box up with 2 N. Which statement best identifies the result of all forces acting on the box?
A. The box doesn't move at all.
B. The box moves left.
C. The box moves right.
D. The box moves downward.
C. The box moves right.
500
Children are applying force to roll a ball down a ramp and measuring how fast the ball rolls. If the children want the ball to roll faster down the ramp, what should they do?
A. increase the force applied to the ball.
B. decrease the height of the ramp
C. decrease the angle of the ramp
D. increase the friction between the ball and the ramp
A. increase the force applied to the ball.
600
An object's resistance to change it's velocity is called what? (Newton's 1st Law)
inertia
600
What is the net force?
400 N down
600
At what letter is the object's speed the fastest?
C, steepest positive slope
600
What important distinction between mass and weight is illustrated in this diagram?
Mass is the same everywhere in the universe but weight depends on the force of gravity.
600
At what letter(s) is the object's stopped?
B and D (slope = 0, so no distance is being traveled during a certain amount of time).