KE and PE # 1
KE and PE # 2
Momentum 1
Momentum 2
Momentum 3
100
True or Flase:
You can measure an object's change in PE.
True
100
True or False:
You can measure an object's potential energy.
False
100
Moving inertia
Momentum
100
change in momentum
impulse
100
In this type of collision objects bounce off each other without deforming or losing energy.
elastic collision
200
Kinetic Energy formula:
KE = 1/2 m.V2
200
Which law is this:
Energy can change form but cannot be created or destroyed.
The law of conservation of energy
200
equation for momentum:
p = m.v
200
A golfer follows through on a swing to increase the ball’s ___________ and make it travel farther.
velocity
200
A massive football player sitting on the bench has __
a. a large momentum
b. a small momentum
c. no momntum
c. no momntum
300
Formula for potential energy:
PE = m.g.h
300
Energy can be changed from potential to _________ and vice versa.
kinetic
300
Unit for momentum
kg.m/s
300
Following through keeps the club head on the ball for a longer period of __________.
time
300
An impulse
a. equals the force applied times the time of application
b. creates a change in momentum
c. both a and b
d. neither a nor b
c. both a and b
400
What is the KE of a baseball having a mass of 0.20 kg that is thrown with a velocity of 16 m/s?
a. 3.2 J b. 51.2 J
c. 25.6 J d. 6.4 J
c. 25.6 J
400
The mechanical energy (ME) is ______ energy plus ______ energy.
mechanical energy = kinetic energy + potenyial energy
ME = KE + PE
400
Since time and velocity are _____________ proportional, increasing time of contact increases velocity.
directly
400
__________ equation:
impulse
400
When the time of an impact is extended, the force exerted is:
a. increased
b. decreased
c. not affected
b. decreased
500
A 3.0 kg book is lifted from a table to a shelf 1.5 m above the floor. What is the gravitational potential energy of the book relative to the floor?
g = 9.8 m/s2
44.1 J
500
What is a 10 kg rock's velocity with the kinetic energy of 2000 J?
20 m/s
500
The mass and change in velocity of the truck are held constant. To decrease force, the __________ it takes the truck to stop must be increased.
time
500
A collection of objects is called:
a. open system b. isolated system
c. closed system d. system
d. system
500
In a closed isolated system of objects __
a. no objects enter or leave
b. no external forces are exerted
c. the total momentum cannot change
d. all of the above
d. all of the above