Question

The car has an initial velocity vi = 27 m/s, and you press the brakes and the car has an acceleration a = -8.4 m/s2 . The car stops.

What else do you know from the given information in the problem?


vf the final velocity

d how far it will travel after you hit the breaks

t the time to come to a stop

Answer 1

From the given information we know vf the final velocity.

What to determine from the given information?

Based on the information given in the situation described, we can deduce that when the car stops, the final velocity of the car will be zero.

vf = vi + at

where;

• vf is the final velocity of the car
• vi is the initial velocity of the car
• a is the acceleration of the car
• t is the time of motion of the car

When the car stops, the final velocity of the car will be equal to zero.

vf = 0

Also, when the final velocity of the car becomes, we can calculate other parameters such as;

• time to come a stop
• distance traveled by the car.