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?

K. E = 0.5 j

Explanation:

Given dа ta:

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