Mechanics Chapter 10 Forces and Motion

Question 1

What is Newton’s first law of motion?

Answer 1

An object at rest will stay at rest, an object moving with constant velocity will continue to move with constant velocity unless an unbalanced force acts on the object

Question 2

What does a resultant force acting on an object cause?

Answer 2

The object to accelerate in the same direction as the resultant force

Question 3

How can you find the resultant of two or more forces given as vectors?

Answer 3

Adding the vectors

Question 4

What does Newton’s second law state?

Answer 4

The force needed to accelerate a particle is equal to the product of the mass of the particle and the acceleration produced
F = ma

Question 5

What type of problems can you use F = ma to solve?

Answer 5

Problems involving vector forces acting on particles

Question 6

How do you solve problems involving connected particles?

Answer 6

Considering the particles separately (or as a single particle if they are moving in the same straight line)

Question 7

Why is it important that a pulley is smooth?

Answer 7

The tension in the string will be the same on both sides of the pulley

Question 8

What does Newton’s third law state?

Answer 8

For every action there is an equal and opposite reaction