Question

A pinball bangs against a bumper, giving the ball a speed of 4. 5 m/s. If the ball has a mass of 50.0 g, what is the ball’s kinetic energy in joules?

Answer 1

Answer:

K.E =  0.5 j

Explanation:

Given data:

Mass of ball = 50 g (50/1000 =0.05 kg)

Speed of ball = 4.5 m/s

K.E of ball = ?

Solution:

Formula:

K.E = 1/2 m.v²

Now we will put the values in formula

K.E = 1/2 (0.05 kg) (4.5 m/s)²

K.E = 1/2 (0.05 kg) 20.25 m²/s²

K.E = 1/2 (1.0 kg. m²/s²)

K.E =  0.5 kg. m²/s²

j = kg. m²/s²

K.E =  0.5 j