Question

How much force is needed to bring a 3200 lb car from rest to a velocity of 44 ft/s in 8 seconds? Please indicate the formula used.

Answer 1

Please keep the same name for your posts. This will be the last of your questions that I answer.

The formula to use is
F = M * a

M must be in slugs (and equals 99.4 slugs) and the acceleration is
a = (44 ft/s)/8 s = 5.5 ft/s^2.

The force F that you compute,
99.4 slugs * 5.4 ft/s^2, will be in pounds.

Note that 1 lb force = 1 slug*ft/s^2

Although 1 pound of mass has a weight force of 1 pound on Earth, it is essential that Weight and mass have different units when doing physics and engineering problems, because force and mass are NOT the same thing.

Answer 2

Ok sir! TNX!