While playing basketball in pe class, 67 kg johan lost his balance after making a lay-up at 5.4 m/s and collided with the padded wall behind the basket and came to rest in 0.24 seconds. what force acted on his body?

a. -1300
b. -1500
c. -1700
d. -1900

-1500

Explanation:

According to newtons second law which states that the change in momentum of a body is directly proportional to the applied force and acts in the direction of the force. Mathematically,

Force = mass(m)×acceleration(a)

Where acceleration = change in velocity/time(t)

Acceleration = final velocity(v)-initial velocity (u)

Force= m(v-u)/t

Given Mass = 67kg, initial velocity = 5.4m/s, final velocity= 0m/s, time = 0.24seconds.

Substituting the values in the formula we have;

Force = 67(0-5.4)/0.24

= 67(-5.4)/0.24

Force = -361.8/0.24

Force = -1507.5

Therefore a force of -1500 is acting on the body

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015