Question

A boy throws a ball of 2.45 newton with a velocity of 12m/s. What is its kinetic energy?

Answer 1

Answer:

A boy throws a ball upwards with velocity v

0

=20ms

−1

. The wind imparts a horizontal acceleration of 4ms

−2

to the left. The angle θ at which the ball must be thrown so that the ball returns to the boy's hand is (g=10ms

2

)

question

Answer 2

Answer:

1.5J

Step-by-step explanation:

K.Energy = (mass*velocity)/2

Velocity=12m/s

Mass=Weight (N)/gravitational acceleration(m/s^2)=2.45N/9.8m/s^2= 0.25kg

So,

K.E=0.25*12/2= 1.5J

Hope it proves helpful