Acceleration
A pilot decreases the landing speed from 70 m/s to 7 m/s in 30 seconds. What was the decceleration of the plane?
-2.1 ms2
A person with a mass of 75 kg is accelerated to 3 m/s2. How much force was applied to him?
225 N
Two inclined planes that come to a point to make lifting or splitting things easier.
Wedge
A car waiting at the starting line is an example of what type of energy?
Potential Energy
A ramp is an example of that type of simple machine?
Inclined Plane
A roller coaster car picks up speed as it rolls down the slope. As it starts down the slope, its speed is 4 m/s. It accelerates at a rate of 6 m/s/s. What is its velocity after 3 seconds?
22 m/s
A truck with a mass of 1500 kg is decelerated at a rate of 5m/s2. How much
force did this require?
7,500 N
An inclined plane wrapped around a pole.
Screw
A trampoline's springs are an example of what type of energy?
Elastic Potential Energy
The steering wheel of a car is an example of what type of simple machine?
Wheel and Axle
An eagle accelerates from 15 m/s to 22 m/s in 4 seconds. What is the eagle’s average acceleration?
1.75 m/s2
A pitcher accelerates a baseball with a mass of 1.5 kg at 6m/s2. How much
force does this take?
9 N
A plane that has one end higher than the other to make pushing or pulling things easier.
Inclined Plane
A ball in the air a split second before it starts falling is an example of what type of energy?
Gravitational Potential Energy
A steel ball whose mas is 2 kg is rolling at a rate of 2.8 m/s. What is its momentum?
5.6 kg m/s
A minivan goes from zero to 55 km/h in 12 seconds. What is its acceleration?
A student starts a food fight by throwing a 0.5 kg burrito He throws it so that he accelerates it at 3 m/s2. How much force did this take?
1.5 N
A wheel with a groove for a rope that is used for lifting things.
Pulley
A bowling pall rolling down the alley is an example of what type of energy?
Kinetic Energy
A marble is rolling at a velocity of 1.5 m/s with a momentum of 0.10 kg m/s. What is the marbles mass?
0.07 kg
A horse running at 12 m/s accelerates to 38 m/s in 10 seconds. What is its acceleration?
2.6 m/s2
A hunter shoots a 2 kg arrow accelerating it at 15m/s2. How much force does
this require?
30 N
A bar that piviots on a fulcrum.
A lever
If a rubber ball hit the floor and is bouncing up, explain what is happening to the levels of kinetic and potential energy in that moment.
A baseball has a mass of 0.14 kg. A pitcher throws a 40 m/s fastball. What is the momentum of the pitch?
5.6 kg m/s