Question

14.
A 2.0 kg mass has 300 J of kinetic energy.
What is the speed of the mass?
A
8.7 m/s
B
12 m/s
с
17 m/s
D
24 m/s

Answer 1

Answer:

C. 17 m/s but answer is 17.3 m/ s

Explanation:

The kinetic energy of the body is

E= mv^ 2/2 = 300J

The mass is given: m=2.0kg

So, the speed is

v=✓2E÷ m = ✓ 600÷ 2 = ✓ 300 ~

V=17.3 m/s

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