What is the magnitude of the sum of the forces that is required to accelerate a 1200-kg car uniformly from 0 m/s to 27.0 m/s in 10.0 s?
A)444 N
B)1620 N
C)3240 N
D)4360 N
E)11800 N

Question

Quizplus · Accepted Answer

We can use the formula:

F = m * a

where 
F = sum of the forces 
m = mass of the car = 1200 kg 
a = acceleration = (change in velocity) / time = (27.0 m/s - 0 m/s) / 10.0 s = 2.70 m/s^2

Substituting the values:

F = 1200 kg * 2.70 m/s^2 = 3240 N

Therefore, the magnitude of the sum of the forces required to accelerate the car uniformly is 3240 N. 
So, the best answer choice is C.

What Is the Magnitude of the Sum of the Forces