Go through the following notes before answering this practice: https://app.peardeck.com/student/txikofoxl
Energy Unit - J
Speed unit - m/s
mass unit - kg
height unit - m
weight unit - N
g = 9.8 m/s2
Go through the following notes before answering this practice: https://app.peardeck.com/student/txikofoxl
2 points
2
Question 1
1.
As a ball is thrown up into the air the Kinetic Energy ________ and the Gravitational Potential Energy _____
2 points
2
Question 2
2.
How much does the KE change if mass doubles
2 points
2
Question 3
3.
How much does the KE change if velocity doubles
1 point
1
Question 4
4.
How much does the KE change if height is doubled
2 points
2
Question 5
5.
How much does the GPE change if height is doubled
1 point
1
Question 6
6.
A jogger with a mass of 60 kg is moving at 2 m/s. What is the jogger's kinetic energy?
1 point
1
Question 7
7.
A ball with a mass of 2 kg is moving at a speed of 3 m/s. What is the ball's heat that is generated?
1 point
1
Question 8
8.
An object has a mass of 2 kg and a kinetic energy of 25 J. What is the object's speed?
1 point
1
Question 9
9.
What is the GPE of a book that has a mass of 1kg that is sitting on a shelf that is 2 m above the ground?
1 point
1
Question 10
10.
How high above the ground is a ball with a mass of 2 kg that has a GPE of 70 J?
1 point
1
Question 11
11.
A rock climber is 200 m above the ground and has a GPE of 10,000 J. What is the climber's mass?
1 point
1
Question 12
12.
A high jumper has a mass of 85.0 kg and a gravitational potential energy of 1970J. How high does he jump?
1 point
1
Question 13
13.
What is the gravitational potential energy of a 73 kg tourist on a tower that is 323 m above the ground?
1 point
1
Question 14
14.
An automobile to be transported by ship is raised 7.3 m above the dock. If its gravitational potential energy is 66,375 J, what is the car’s mass?
1 point
1
Question 15
15.
A sea turtle has a mass of 860 kg. If the gravitational potential energy of the turtle is 20,500 J as it is being lifted onto a ship, how high above the water is the turtle?
1 point
1
Question 16
16.
A 1750 kg weather satellite has a gravitational potential energy of 169,311,000J. How high above the earth’s surface is the satellite?
1 point
1
Question 17
17.
The world record for pole vaulting is 6.15 m. If the vaulter’s gravitational potential energy is 4942 J, what is his mass?
2 points
2
Question 18
18.
If a bird lands on top of a tower and has a gravitational potential energy of 2033 J, what is the bird’s weight? The peak of the tower is 629 m above the ground. (Hint: Weight is measured in Newtons)