Forces and Motion 1
Gravity is an example of what type of force?
Non-contact force
A push or pull
Force
Contact for or Non-contact force?
Hitting a tennis ball with a tennis racquet
Contact Force
Stored up energy is called...
Potential Energy
Moving energy is known as
Kinetic Motion
A pull towards or push away between magnets is called...
Magnetic force
Name one unit that you can measure time in
Answers vary
Seconds
Minutes
Hours
Forces that cause a change in motion are called..
unbalanced forces
Friction in the air is called...
Air Resistance
F = ma
Inertia
A force between two surfaces which prevents them from sliding past one another.
Friction
Speed can be measured by...
Dividing the distance travelled by the time it takes (d/t)
In a game of tug-o-war, what happens when the forces exerted by Team A and Team B are balanced?
neither team wins
A change in speed is known as...
Velocity
Besides strength, what does every force have?
Direction
Forces are measured in these units
Newtons (N)
Forces on an object that are equal in size and opposite in direction, cancelling each other out are called...
Balanced Forces
W = mg
Weight
What is Newton's first law of motion?
An object at rest remains at rest unless acted upon by an outside force. An object in motion remains in motion unless acted upon by an outside force.
A crash test dummy is pushed forward when the test car hits a wall. This is an example of Newton's ..... law of motion
First (1st)
For every action there is an equal and opposite reaction
Newton's third law of motion
Newton's 3rd Law of Motion explains what happens before, during and after these.
What are collisions?
An ice skater does not want this type of force between their skates and the ice
Friction