What non-contact force pulls a ball back to earth?
Gravity
If these boys are each pulling with the force of 10 newtons. What will happen? (double jeopardy)
Nothing, the forces are balanced and they will not move.
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.
Objects at rest tend to stay at rest, while objects in motion tend to do what?
Stay in motion
Which situation best describes overcoming the force of gravity?
A. Sitting in a chair.
B. Jumping up and down.
C. Standing next to your friends.
D. Eating lunch.
B. Jumping up and down.
Speeding up, slowing down or changing direction
Acceleration
Based on the Sum of Forces which team will win: RED or BLUE?
RED
A car and semi 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.
This law states that for every action, there is an equal and opposite reaction.
Law 3
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
The tendency of an object to resist a change in its state of motion.
Inertia
What force is acting against the box's motion?
friction or frictional force
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.
How do you calculate speed?
Speed = distance / time
The force that acts directly against the direction of motion.
What is friction?
This means how fast the position of an object changes over time.
Speed
At what 2 letter(s) is the object's stopped?

B and D
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.
An object's resistance to change it's motion is called what? (Newton's 1st Law)
inertia
Is a bicyclist going who is moving at a constant speed in a figure 8 pattern accelerating?
YES because he is changing direction
(acceleration is any change in speed and/or direction)
The force that is the result of an action.
Reaction
What is the net force? (double jeopardy)

400 N toward gravity
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.
A football gets punted and travels 90 meters in 9 seconds, what is the football’s speed?
10 m/s
When one object applies force to another object it is called:
A- Friction
B- Action
C- Momentum
D- Speed
B
This is the combination of explaining the movement of an object by both it's speed and direction.
Velocity
At what letter is the object's speed the fastest?

C, steepest positive slope
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.
A rocket taking off demonstrates which of Newton's law of motion?
3
Forces on an object that are moving at a constant speed (or at rest) need to be ____________.
Balanced