Newton's law and forces
Energy, Work and Power
1D Motion
2D Motion
Momentum
100
A child riding a merry-go-round feels a centripetal force.How would the magnitude of the acceleration change if the velocity doubled (2x)?
decrease to one quarter (¼ x)
100
What is the kinetic energy of a 52 kg man running at 4 m/s?
K=416 joules
100
If an object maintains a constant velocity,what is the acceleration
The acceleration is zero
100
The horizontal acceleration of a projectile is ALWAYS
ZERO
100
What is an object’s change in momentum equal to?
the impulse acting on the object
200
If the bus is traveling around a curve of 30m radius at a velocity of 8 m/s, what is the centripetal acceleration of the car?
2.13 m/s
200
An 10 kg dog is running at 6m/s. What is the kinetic energy of the dog?
180 joules
200
Displacement is a vector quantity because it includes information about:
Magnitude and direction
200
For a projectile, which velocity remains constant as long as air resistance is ignored?
Horizontal
200
An object has a mass of 100 kg moving at 5m/s. What is the linear momentum of the object?
P=500 kg m/s
300
If the bus of 150kg is traveling around a curve of radius of 50m at a velocity of 32 m/s, what is the centripetal force of the car?
3072N
300
Calculate the kinetic energy of a car of mass 389 kg moving with a velocity of 53 km per hour.
K=42971.102 J
300
how do speed and velocity differ from each other?
Velocity represents the change in position, Speed represents the total distance covered
300
A football was kicked toward the goal. The horizontal component of velocity was 10 m/s and the vertical component was 7 m/s . What is the magnitude of the resultant velocity of the soccer ball?
12 m/s
300
Egg A is dropped from a height of 1m onto the floor. Egg B is dropped from a height of 1m into a bucket of water. Which statement correctly describes why Egg B does not break?
Egg B experiences less force over a longer time
400
If the car of 50 kg is traveling around a curve of radius of 20m at a velocity of 50 m/s, what is the centripetal force of the car?
6250 N
400
How high does a 4.5 kg piece of orange need to be raised above the ground for the orange-Earth system to have a gravitational potential energy of 92 J?
92 m
400
A dog moves once around the perimeter of a rectangular table with dimensions 3 m by 4 m. What is the teachers final displacement?
0 m
400
You drop a package from a plane flying at a constant speed in a straight line. Without air resistance, the package will...
Remain vertically under the plane while falling
400
What is the momentum of a 5.0-kg brick moving through the air at 10 m/s?
50kg m/s
500
A truck of a mass of 8,500 kg accelerates at 5.6 m/s2. What is the resultant force acting on the car?
47,600 N
500
A water balloon has a mass of 8,000 grams. How much energy is needed to throw it with a velocity of 6.7 m/s?
179.56 Joules
500
If you are riding on a car with your dog , you can tell you are moving by observing the motion of objects like trees and houses outside the windows. What is your frame of reference for detecting the motion of the car?
(a.your dog(b.objects outside the windows Displacement (c.seat on the bus.(d.the bus driver
b.objects outside the windows Displacement**
500
At what angle can a projectile be launched in order to travel the greatest distance?
45 degrees
500
A dad on ice skates is quickly moving forward. He child is in front of him going slowly in the same directions. As he catches up, he scoops the child into his arms. What will happen next?
The dad and the child still move forward but at a slower velocity.