Question

An SUV is traveling at a speed of 18 m/s.if the SUV had a mass of 1,550kg, what force must be applied to stop it in 8seconds?

Answer 1

To solve this question, we have to find the acceleration of the car first. Acceleration refers to the rate of change  of velocity of an object with respect to time. 
Acceleration [A] = [V0 - V1] / T 
Where VO = Initial velocity and V1 = Final velocity T represent time.
V0 = O
V1 = 18
T = 8
A = [ 0 - 18] / 8 = - 2.25
 A = - 2.25 M/S^2.
To find force, we are going to use the formula: F = MA
 F = ?
M = 1550
A = - 2.25
F = 1550 * - 2.25 = 3487.5
Therefore, F = -3487.5 N