Forces
How much force is needed to stop a block moving with 100 N?
100 N in the opposite direction
What does Newton’s Third Law say?
For every action, there is an equal and opposite reaction.
When do you have the least kinetic energy on a roller coaster?
At the top of the hill.
What causes an object to accelerate?
A force acting on it.
If two students pull on a ring with different forces, what happens to the ring?
It moves toward the stronger force.
Which is an action-reaction pair?
The equal and opposite forces that two interacting objects exert on each other, as described by Newton's Third Law of Motion
What kind of energy does a pendulum have at the top of its swing?
Potential energy.
If a force of 4 N causes an acceleration of 1.2 m/s² on a model boat, what force would cause an acceleration of 2.4 m/s²?
8N
Name the three forces acting on a rocket during launch.
Push/Thrust, drag, and weight.
Why is it hard to walk on ice?
Because there is very little friction; the ice doesn’t push back enough.
What happens to potential energy as a rock falls off a cliff?
It decreases.
When a car turns left, which way do loose objects inside move?
To the right.
If forces of 12 N and 13 N pull a box in opposite directions, which way does it move?
Toward the 13 N force.
What happens to an astronaut after pushing a keyboard in space?
The astronaut moves away from the keyboard.
What energy change happens at the top of a roller coaster hill?
Kinetic energy changes into potential energy.
If three forces act on a box on a frictionless floor, what happens?
The box moves in the direction of the net/strongest force.