Show:
Work It Out
Friction and Gravity
Newton's Laws
Formulas
Potpourri
100
A 10-kg ball is accelerated 400 m/s² by a force of _____N.
4000 N
100
Friction acts in a direction ____________ to the direction of an object's motion.
OPPOSITE
100
Unless an object at rest is acted upon by a force, it stays at rest due to its ____________.
INERTIA
100
The formula you would use to find MOMENTUM equals.....
Momentum = Mass x Velocity
100
A newton is a unit of _________________.
force
200
The momentum of a 1000-kg car traveling at a velocity of 5 m/s is ____________kg·m/s.
5000 kg·m/s
200
The amount of matter in an object is called its _____________________.
MASS
200
A(n) ___________________________ can cause an object's motion to change.
UNBALANCED FORCE
200
The formula you use to find ACCELERATION equals......
Acceleration = Net Force / Mass
200
Forces can be added together only if they are acting on _______________.
The same objects
300
A 20-kg ball is accelerated 300 m/s² by a force of _____N.
6000 N
300
Weight is the measure of _______________on an object
gravity
300
Newton's 2nd Law of Motion says _________________increases as force increases, if mass stays the same
Acceleration
300
The formula you would use to find MASS equals.....
Mass = Net Force x Acceleration
300
An object in free fall _____________ until it reaches terminal velocity.
accelerates
400
The momentum of a 2500-kg car traveling at a velocity of 10 m/s is ____________kg·m/s.
25000 kg·m/s
400
Air rushing against an airplane is an example of what kind of friction?
fluid
400
The total momentum of any group of objects remains the same unless an ________________ force act on the objects.
outside
400
The formula you use to find NET FORCE equals......
Net Force = Mass x Acceleration
400
A_________________________ causes objects to move in a circle.
Centripetal force.
500
What is the net force acting on a 0.15-kg hockey puck accelerating at a rate of 12 m/s²?
1.8 N (0.15 kg x 12 m/s²)
500
The force due to gravity is stronger if two objects are____________.
closer
500
The momentum of an object depends on its mass and ______________________.
Velocity
500
There is a force of 15000N on a 30-kg ball. What is the acceleration of the ball?
500 m/s²
500
The unit of force, known as a newton, is equal to ______________________.
kg*m/s^2