Vocabulary
A push or pull
What is a Force?
The amount of matter something has. Units are kg.
What is Mass
A hockey puck on a frictionless table will keep moving at a constant velocity until it is hit.
What is Newton's First Law
Find the net force required to push a 5 kg object with a 2 m/s2 acceleration
What is 10 N
A chance in an object's velocity or direction.
What is acceleration
Force of gravity.
What is Weight
Unbalanced forces makes objects _____________
accelerate
It takes less force to move a soccer ball than a bowling ball.
What is Newton's Second Law
A 12 kg object experienced a 24 N net force. Find the acceleration.
What is 2 m/s2
When in free fall, this is what happens when drag force equals force of gravity.
What is Terminal Velocity
An object has a mass of 55 kg. Find its weight on Earth. Include units.
gearth = 9.8 , gmoon = 1.6
What is 539 N
Every force has an _______________ reaction force
Equal and opposite
You swim forward by pushing water backwards.
What is Newton's Third Law
A 20 kg box was pushed with a force of 85 N. Friction opposed the push with 25 N. Find the box's acceleration.
What is 3 m/s2
A perpendicular reaction force. Prevents a book from falling through a table.
What is Normal Force
An object has a mass of 65 kg. Find its mass on the Moon.
gearth = 9.8 , gmoon = 1.6
What is 65 kg
An object in motion will stay in motion, with a _____________ , until an external force acts on it.
What is Constant Velocity
You lurch forward when a car slams on the brakes.
What is Newton's First Law
In tug of war, the rope was pulled with 2000 N of force in both directions. The combined mass of people was 400 kg. Find the rope's acceleration.
What is 0 m/s2
An object's resistance to change in movement. Depends on mass.
An object has a weight of 40 N on the Moon. Find its weight on Earth.
gmoon = 1.6 , gEarth = 9.8
What is 245 N
A book with a mass of 3 kg is sitting motionless on a table. Find the normal force acting on the book.
What is 29.4 N
A rocket accelerates upward by exerting a force downwards.
What is Newton's Third Law
A 2kg object was held by a spring scale. It was yanked upward with an acceleration of 2.5 m/s2. Find FT , the tension on the spring scale.
gearth = 9.8
What is 24.6 N