Unit 1D Motion
Newton's law and Forces
2D Motion
Work Power Energy
Momentum
100
What is the SI unit for acceleration?
m/s^2
100
A ball was spinning around on a string of a certain radius at a constant speed. Then it went around the same curve at half of the original speed. Which of the following correctly identifies the new force acting on the ball?
The new force exerted on the car towards the center of the curve was one-half as much as before
100
Which of the following measurements is NOT a Scalar?
Displacement
100
What is the formula for work?
W = fd
100
What is an object's change in momentum equal to?
The impulse acting on the object.
200
What is the difference between speed and velocity?
Speed is a scalar quantity, while velocity is a vector quantity
200
Which FBD below shows the object moving with a constant speed?
The answer is A
200
For a projectile, which velocity remains constant as long as air resistance is ignored?
Horizontal velocity
200
An 8 kg dog is running at 4 m/s. What is the kinetic energy of the dog?
64J
200
What is the formula for Momentum?
P = mv
300
What is the average acceleration of an object that changes its velocity from 10 m/s to 30 m/s in 5 seconds?
4 m/s^2
300
Rank the Magnitude from least to greatest.
D<C<B<A
300
The horizontal acceleration of a projectile is ALWAYS
Zero
300
What is the kinetic energy of a 60 kg man running at 8 m/s?
1920J
300
A layer of padding is added to car dashboards because it can reduce some injuries during a collision. How does the padded dashboard make people safer?
it increases the time of impact during the collision.
400
What is the formula for Average Velocity?
Average Velocity= Displacement/Time
400
A truck is turning a curve of 100m radius at a velocity of 5m/s what is the centripetal acceleration of the truck?
0.25m/s^2
400
A football was thrown. The horizontal component of velocity was 25 m/s and the vertical component was 7 m/s . What is the magnitude of the resultant velocity of football?
32m/s
400
What is the formula used to find Kinetic energy?
K = 1/2mv^2
400
An object has a mass of 100 kg moving at 5 m/s. What is the linear momentum of the object?
500 kg m/s
500
What is the average acceleration of an object that changes its velocity from 30 m/s to 70 m/s in 12 seconds?
3.33 m/s^2
500
If a truck of 130kg is traveling around a curve of radius of 50m at a velocity of 30 m/s, what is the centripetal force of the truck?
2340N
500
A soccer ball was kicked. The horizontal component of velocity was 50 m/s and the vertical component was 25 m/s . What is the magnitude of the resultant velocity of soccer ball?
75m/s
500
An 64 kg car is driving at 12 m/s. what is the kinetic energy of the car?
4608J
500
An object is 300 kg and is moving at 10 m/s. What is the linear momentum of the object?
3000 kg m/s