Forces

Question 1

What is elastic deformation

Answer 1

An object that can go back to its original shape and length after the force has been removed

Question 2

What is inelastic deformation

Answer 2

An object that doesn’t return to its original shape and length after the force has been removed

Question 3

What is drag

Answer 3

Resistance you get in fluid

Question 4

How do you reduce drag

Answer 4

Keep objects streamlined

Question 5

How does friction work

Answer 5

When it’s in the opposite direction to true movement

Question 6

What is terminal velocity

Answer 6

Balance between air resistance and weight

Question 7

What is Newton’s first law?

Answer 7

If true resultant force on a stationary object is zero the object will remain stationary. If the resultant force on a moving object is zero, the same object will carry on moving with the same velocity

Question 8

What is Newton’s 2nd law?

Answer 8

The acceleration is directly proportional to the resultant force and inversely proportional to the mass

Question 9

What is Newton’s 3rd law?

Answer 9

When 2 objects interact the forces are equal but opposite

Question 10

What is inertia

Answer 10

The tendency for motion to remain unchanged

Question 11

What is the conservation of momentum

Answer 11

Momentum is always conserved, momentum before = momentum after