Question

a ball is rolled at a gelocity oif 12 m/sec after 36 seconds it comes to a stop what is the accleration

a dragster in a race accelerated from stop to 60 m/s by the time it rreached the finish line. the dragster moved in a straight line and traveled froom the starting line to finish line in 8.0 sec what was the acceleration of the dragster

Answer 1

For the first problem:
Initial velocity, u = 12 m/s
Final velocity, v = 0 m/s
Time, t = 36 seconds

Acceleration, a can be calculated using the equation:
a = (v - u) / t
a = (0 - 12) / 36
a = -12 / 36
a = -1/3 m/s^2

Therefore, the acceleration of the ball is -1/3 m/s^2.

For the second problem:
Initial velocity, u = 0 m/s
Final velocity, v = 60 m/s
Time, t = 8.0 seconds

Acceleration, a can be calculated using the equation:
a = (v - u) / t
a = (60 - 0) / 8
a = 60 / 8
a = 7.5 m/s^2

Therefore, the acceleration of the dragster is 7.5 m/s^2.