m = mass of the volleyball = 21. kg
v = speed of the volleyball as it leaves her hand = 30 m/s
KE = kinetic energy of the volleyball
kinetic energy of the volleyball is given by the formula
KE = (0.5) m v²
inserting the above values in the formula
KE = (0.5) (2.1) (30)²
KE = (0.5) (2.1) (900)
KE = (0.5) (1890)
KE = 945 Joules
hence the energy of the volleyball comes out to be 945 Joules
The energy of the ball is 945 N
The parameters given in the question are;
mass of the volleyball is 2.1 kg
speed of the ball is 30m/s
The formula for calculating the kinetic energy is
= 1/2mv²
= 1/2 × 2.1 × 30²
= 0.5 × 2.1 × 900
= 945 N
Hence the kinetic energy of the ball is 945 N
Please see the link below for more information
https://brainly.com/question/20161879?referrer=searchResult
