Question

A 2.3 kg object has 15 ) of kinetic energy. Calculate its speed.

O A. 0.12 m/s
OB. 1.1 m/s
O c. 2.4 m/s
OD. 3.6 m/s

Answer 1

The answer is option D

Step-by-step explanation:

To find the speed given the kinetic energy and mass we use the formula

`v = \sqrt{ (2KE)/(m) } \\`

where

m is the mass

v is the speed

From the question

KE = 15 J

m = 2.3 kg

We have

`v = \sqrt{ (2 * 15)/(2.3) } = \sqrt{ (30)/(2.3) } \\ = 3.61157559...`

We have the final answer as

3.6 m/s

Hope this helps you