Question

Use Newton's second law of motion to solve the following problems.

a. A car accelerates forward at 3.5 m/s2. If the car has a mass of 873 kg, what is the force applied to the car?

b. Ron bicycles forward with an acceleration of 2.1 m/s2. If he is applying a forward force of 195 N, what is his mass?

c. What is the acceleration of a skateboarder of mass 46 kg who is being pushed forward with a force of 120 N?

Answer 1

F = ma for all three problems, plug in the 2 given quantities and solve for the third, be careful about units

Answer 2

a. A car accelerates forward at 3.5 m/s2. If the car has a mass of 873 kg, what is the force applied to the car? (1 point)


F=ma
F=3.5*873=3055.5

b. Ron bicycles forward with an acceleration of 2.1 m/s2. If he is applying a forward force of 195 N, what is his mass? (1 point)

F=ma
F=2.1*195=409.5


c. What is the acceleration of a skateboarder of mass 46 kg who is being pushed forward with a force of 120 N? (1 point)

F=ma
120=a*46
=2.61

Answer 3

check b again

Answer 4

b. Ron bicycles forward with an acceleration of 2.1 m/s2. If he is applying a forward force of 195 N, what is his mass? (1 point)

F=ma
195=2.1*m=92.86

Answer 5

awesome

units of force are N, acceleration is m/s/s, mass is kg

Answer 6

so
a.N
b. kg
c.m/s/s

Answer 7

yes