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Calculating Kinetic Energy II

Total questions: 25

Worksheet time: 25mins

Name
Class
Date
1.

suppose a girl with a mass of 50 kg is jogging at a speed of 2 meters per second (m/s). Note that1kg.m2/s2=1joule (J)

a)

=100 J

b)

=50J

2.

What is the kinetic energy for the white dog? remeber use the formula: Ke=1/2 X m X V2

a)

45 J

b)

55J

3.

What is the kinetic energy for the black dog?

a)

100 J

b)

90 J

4.

A graph showing the kinetic energy of a 10 kg object at different speeds is provided. Based on the information in the graph, we can predict that the kinetic energy of the object at 2 m/s would be-

a)

12 Joules.

b)

20 Joules.

c)

38 Joules.

d)

44 Joules

5.

Calculate KE. m=2 kg v=3 m/s

a)

3 J

b)

6 J

c)

9 J

6.

Use the chart to calculate the kinetic energy.

KE=m×v22  KE=\frac{m\times v^2}{2}\ \

You must show work.

7.

Use the chart to calculate the kinetic energy. KE=\frac{m\times v^2}{2}\ You must show work.

8.

What is the kinetic energy of a bike with a mass of 16 kg traveling at 4 m/s?

9.

What is the formula for calculating kinetic energy?

10.

Which graph correctly shows the relationship between KE and velocity? Remember that KE=1/2mv^2.

a)

Direct Relationship

b)

Exponential Relationship

c)

Approaching Max Relationship

d)

Exponential Decay

11.

A .43kg soccer ball is kicked with a velocity of 10m/s. The goalie tries to save it, but because it has so much KE, it glances of his hands and into the net for a goal. The ball had (a)   J of KE.

12.

A golf pro swings her driver which weighs 0.15Kg at a velocity of 60 m/s. The KE of the golf club is (a)   J. Type your answer

13.

If the speed is doubling, what happens to the kinetic energy?

a)

it doubles

b)

it stays the same

c)

it triples

d)

it quadruples

14.

What is the Kinetic Energy of a 150 kg object that is moving with a speed of 15 m/s?

(a)  

15.

What is the Kinetic Energy of a 1200 kg object that is moving with a speed of 24 m/s?

(a)  

16.

What is the Kinetic Energy of a 478 kg object that is moving with a speed of 15 m/s?

(a)  

17.

What is the Kinetic Energy of a 100 kg object that is moving with a speed of 12.5 m/s?

(a)  

18.

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has (a)   energy. Calculate it.

19.

A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has (a)   energy. Calculate it.

20.

An 8kg dog chases a cat. if the dog has 400J of kinetic energy, the velocity of the dog is (a)   m/s?

21.

Mass and speed have a (a)   proportional relationship with kinetic energy.

22.

A car with a mass of 1000 kg is moving at a speed of 10 m/s. What is its kinetic energy?

a)

50000 J

b)

10000 J

c)

20000 J

d)

25000 J

23.

If the speed of an object is doubled, how does its kinetic energy change?

a)

It doubles

b)

It quadruples

c)

It triples

d)

It remains the same

24.

A 2 kg ball is dropped from a height and reaches a speed of 8 m/s just before hitting the ground. What is its kinetic energy at that moment?

a)

64 J

b)

32 J

c)

16 J

d)

128 J

25.

Which of the following statements is true about kinetic energy?

a)

Kinetic energy is always positive

b)

Kinetic energy can be negative

c)

Kinetic energy is independent of mass

d)

Kinetic energy is independent of speed