A 53.5-g Super Ball traveling at 27.5 m/s bounces off a brick wall and rebounds at 21.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 4.05 ms, what is the magnitude of the average acceleration of the ball during this time interval

Explanation:

Acceleration is the rate of change of velocity of a body. It is expressed as;

acceleration = change in velocity/time

acceleration a = v-u/t

Given

v = 27.5m/s

u = -21.5m/s (rebounds in the opposite direction)

time t = 4.05ms = 0.00405secs

Required

acceleration

Substitute the given values into the formula

a = 27.5-(-21.5)/0.00405

a = 27.5+21.5/0.00405

a = 49/0.00405

a = 12,098.77m/s²

Hence  the magnitude of the average acceleration of the ball during this time interval is 12,098.77m/s²

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

no

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