2g Force and Motion VII

Whatsapp Cikgu Kwee now!

Time limit: 0

Quiz Summary

0 of 11 questions completed

Questions:

1
2
3
4
5
6
7
8
9
10
11

Information

You have already completed the quiz before. Hence you can not start it again.

Quiz is loading…

You must sign in or sign up to start the quiz.

You must first complete the following:

Results

Quiz complete. Results are being recorded.

Results

0 of 11 questions answered correctly

Time has elapsed

You have reached 0 of 0 point(s), (0)

Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)

Average score
Your score

Categories

Not categorized 0%

Would you like to submit your quiz result to the leaderboard?

Loading

Name: E-Mail:

Captcha:

maximum of 11 points
Pos.	Name	Entered on	Points	Result
Table is loading
No data available

1
2
3
4
5
6
7
8
9
10
11

Answered
Review

Question 1 of 11

1. Question
1 point(s)
Determine the kinetic energy of a 600kg car that is moving at a speed of 20.0 m/s.
- 120,000 J
- 6,000J
- 240,000J
- 60,000J
Correct

Incorrect
Question 2 of 11

2. Question
1 point(s)
An object of 2kg mass dropped from a height of 2m and then bounced up to a height of 1.5 m. Find the amount of energy lost in the process.
- 10J
- 40J
- 30J
- 50J
- 70J
Correct

Incorrect
Question 3 of 11

3. Question
1 point(s)
A girl weighing 400 N takes 4 s to run up a staircases of height 15m. How much potential energy does she gain ?
- 6,000 J
- 60,000 J
- 2,400 J
- 24,000 J
Correct

Incorrect
Question 4 of 11

4. Question
1 point(s)
When a moving object is stopped due to friction, its kinetic energy is converted into
- potential energy
- heat energy
- mechanical energy
Correct

Incorrect
Question 5 of 11

5. Question
1 point(s)
A ball of 1kg mass is released from a height of 5m. What is the kinetic energy possessed by the ball at the height of 2m? (Ignore the energy loss due to the air resistance)
- 20 J
- 30 J
- 40 J
- 50 J
- 60 J
Correct

Incorrect
Question 6 of 11

6. Question
1 point(s)
The figure shows a ball thrown from a building of height 10m. Find the speed of the ball right before it hit the ground.
- 15 ms⁻¹
- 10 ms⁻¹
- 5 ms⁻¹
- 20 ms⁻¹
Correct

Incorrect
Question 7 of 11

7. Question
1 point(s)
A student pulls a 50 kg box up a smooth plane inclined at 30° to the horizontal as shown in the figure above. If the length of the plane is 5 m, find the work done in pulling the box to the top of the plane.
- 1250 J
- 2500 J
- 1500 J
- 1750 J
Correct

Incorrect
Question 8 of 11

8. Question
1 point(s)
A student of mass 50kg does push-ups by applying a force to elevate its center-of-mass by 20cm. Determine the number of push-ups which he must do in order to do a 5000 Joules of work.
- 25
- 50
- 75
- 100
Correct

Incorrect
Question 9 of 11

9. Question
1 point(s)
A trolley moves against friction of 10N. The initial velocity of the trolley is 5 ms^-1. The trolley comes to rest in 6s. Find the work done by the friction.
- -150 J
- -300 J
- -60 J
- -50 J
Correct

Incorrect
Question 10 of 11

10. Question
1 point(s)
The figure shows a 10N force acting on a block. The block moves 5m to the right. Calculate the work done by the force.
- 50 J
- -50 J
- 0 J
- 25 J
Correct

Incorrect
Question 11 of 11

11. Question
1 point(s)
Which of the following statements is true about work done?
- Work is a vector quantity.
- Work done can be positive or negative.
- Work has the same unit as energy.
- Work is done when a force is applied to an object.
Correct

Incorrect