Question

10) A soccer player kicks a soccer ball (m = 0.42 kg) accelerating from rest to 32.5m/s in 0.21s. Determine the force that sends soccer ball towards the goal.

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11) Small rockets are fired to make small adjustments in the speed of a satellite. A certain small rocket can change the velocity of a 72,000kg satellite from 0m/s to 0.63m/s in 1296s. What force is exerted by the rocket on the satellite?

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please I need help I don't understand it and I had to deliver it yesterday helpp:(

Answer 1

Step-by-step explanation:

(10) Mass of a soccer player, m = 0.42 kg

Initial speed, u = 0

Final speed, v = 32.5 m/s

Time, t = 0.21 s

We need to find the force that sends soccer ball towards the goal.

Force, F = ma

`F=(m(v-u))/(t)\\\\F=(0.42 * (32.5-0))/(0.21)\\\\F=65\ N`

So, 65 N of force soccer ball sends towards the goal.

(11) Mass of the satellite, m = 72,000 kg

Initial speed, u = 0 m/s

Final speed, v = 0.63 m/s

Time, t = 1296 s

We need to find the force is exerted by the rocket on the satellite.

Force, F = ma

`F=(m(v-u))/(t)\\\\F=(72,000* (0.63-0))/(1296)\\\\F=35\ N`

So, 35 N of the force is exerted by the rocket on the satellite.

Hence, this is the required solution.