Force is the mass of an object, multiplied by its acceleration. The unit of force is . This is called a Newton, with the symbol N. Force has a magnitude and a direction.
force = mass x acceleration
F = ma
F = force
m = mass
a = acceleration
Force Formula Questions:
1) A 0.15 kg coconut falls out of its tree. The acceleration due to gravity is 9.80 m/s2, down. What is the force acting on the coconut due to gravity?
Answer: The force can be found using the equation:
F = ma
F = (0.15 kg)(9.80 m/s2)
F = 1.47
Solve: F = ?.?? N
The force due to gravity acting on the coconut is 1.47 N, down.
2) A man pushes a 50.0 kg block of ice across a frozen pond. He applies a force of 25.0 N, pushing the block away from him. What is the acceleration of the block?
Answer: To find the acceleration, rearrange the equation:
Solve: a = ?.?? m/s2
The block is accelerating 0.?? m/s2, directed away from the man.