Forces
Weight
Newtons Laws
Circular motion
Momentum
More force
100
What instrument is used to measure force?
spring scale
100
What is the formula for weight?
F=ma, F=m*(acceleration of gravity), F=m*9.8
100
What is Newtons first law of motion?
An object in motion stays in motion and an object at rest stays at rest unless acted on by an opposing force
100
Define Centripetal force
force on an object on a circular path that keeps the object moving on the path
100
what is the formula for momentum
p=mv
100
What is it call when forces on an object are equal.
Balanced force
200
What is the force of gravity?
9.8m/s
200
calculate the weight of a person with a mass of 67.2kg.
658.56N
200
What is newtons 3rd law of motion?
every action has an equal and opposite reaction
200
Is centrifugal force real?
No, its considered a fictitious force
200
what is the units for momentum?
kg*m/s
200
A person with a mass of 63 kg is accelerated to 4 m/s2. How much force was applied to him?
252N
300
a man jumps out of a plane with a parachute. what force slows down his fall?
air resistance or drag
300
Calculate the weight of a dog with a mass of 15kg
147N
300
What is newtons second law of motion?
Force is equal to mass times acceleration
300
Name one of the formulas for centripetal force
300
A car weighs 435kg and is moving at 4m/s, what is its momentum?
1740kg*m/s
300
a force of 35N acts upon a 4kg block. calculate the acceleration of the object.
8.75m/s2
400
What type of friction opposes two surfaces that are already sliding.
Sliding friction
400
calculate the mass of a dog that weighs 53N
5.41kg
400
What is another name for Newtons first law of motion?
law of inertia
400
Calculate the centripetal force acting on a 915 kg car as it rounds an unbanked curve with a radius of 72 m at a speed of 23 m/s.
6722.71N
400
A car that weights 450kg and is moving at 35 m/s has what momentum?
15,750kg*m/s
400
If you hit a wall with 650N how many Newtons does the wall exert back
650N
500
What is terminal velocity
When the force of gravity and the force of air resistance are equal to each other during freefall.
500
Why is mass more fundamental than weight
mass doesn't change, weight depends on gravity
500
which law is known as the law of conservation of momentum
Newtons 3rd law
500
A car with a mass of 823 kg rounds an unbanked curve in the road at a speed of 27.0 m/s. If the radius of the curve is 106m, what is the average centripetal force exerted on the car?
5660.07N
500
calculate the mass of a car that moving at 25m/s with the momentum of 3500kg*m/s.
140kg
500
Why can't you hit a feather with a large force?
Because the feather cannot hit you back with a large force