A car is traveling to the right with an initial speed of 20 m/s. The car...

A car is traveling to the right with an initial speed of 20 m/s. The car slows down to a stop in 25 seconds. What is the acceleration of the car?

Expert Solution

According to the problem,

The initial speed of the car towards right is U = 20 m/s;

The time in which the get slow down is t = 25 second;

As the body is in retardation,

The equation of motion is V = U - (a)(t);

V- the final velocity of the car is equal to zero (because the car comes to stop)

U- the initial velocity of car

a – the acceleration of the car (here it is negative because retardation)

i.e. V = U + at;

0 = 20 - a (25);

a = 20 / 25 = 0.8 m/s²;

so retardation is 0.8 m/s², the acceleration is -0.8 m/s²;

Hence the acceleration of the car is a = - 0.8 m/s²;

Hence the solution to the problem.

genius_generous answered 2 years ago

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