Force

Question 1

Any object at rest or in uniform motion

Answer 1

will remain that way unless acted upon by a force

Question 2

A force is

Answer 2

that which changes the state of motion of an object

Question 3

Newton’s laws of motion

Answer 3

1) Every object at rest or in uniform motion remains that way unless acted upon by a force
2) force is equal to mass by acceleration [F=ma]
3) for every action there is an equal but opposite reaction

Question 4

Unit for force

Answer 4

Newton (N)

Question 5

If a force of 100N acts on a mass of 20kg what is the acceleration?

Answer 5

100N/20kg = 5 m/sec²

Question 6

if a person has a mass of 75kg what is their approximate weight

Answer 6

75kg x 9.8m/s = 735N

Question 7

Gravity

Answer 7

There is a force of attraction between any two objects which have mass

Question 8

Newton’s law of gravitation (inverse square law)
force is proportional to 1/the distance squared

Answer 8

F = G(m1m2/d^2)

F = gravitational force
G = gravitational constant
m1 = mass of object 1
m2 = mass of object 2
d = distance between masses

Question 9

Newton’s second law

Answer 9

F = mg

F = force
m = mass
g = acceleration due to gravity

Question 10

The accepted value for g (acceleration due to gravity)

Answer 10

9.81m/s