Forces

Question 1

What is termal velocity

Answer 1

When resultant force is 0

Question 2

Extension is directly proportional to

Answer 2

Force applied

Question 3

What is a moment

Answer 3

The turning effect of a force

Question 4

What is pressure

Answer 4

The Collisions of air molecules

Question 5

What is upthrust always equal to

Answer 5

Weight of fluid that object displaces

Question 6

Newton’s first law

Answer 6

It will remain at rest or state of uniform unless an external force is appiled

Question 7

Newton’s second law

Answer 7

Acceleration is directly proportional to resultant force and indirectly proportional to mass

Question 8

Newton’s third law

Answer 8

When two forces interact the force they exert is always equal

Question 9

Momentum

Answer 9

In a closed system momentum before is equal to momentum after

Question 10

What is elastic deformation

Answer 10

When two forces are applied and it returns to original shape

Question 11

What does a lever consist of

Answer 11

Load effort and pivot

Question 12

How does a seatbelt improve passsnegers safety

Answer 12

Passenger must decelerate from vehicles velocity at impact 0
Force experienced is equal to rate of change of momentum

Question 13

Where is atmosphere most dense

Answer 13

Closest to earth

Question 14

Momentum is 0 when

Answer 14

You are not moving

Question 15

If the gear is larger the ……
Is larger

Answer 15

Turning effect

Question 16

Practical for extension

Answer 16

Wooden splint on end of spring to clearly mark
Add 1n at a time and measure
Then subtract to find extension

Question 17

Rapid change in momentum lead to

Answer 17

Large forces

Question 18

Sky diver

Answer 18

At start only force is weight and gravity
Friction as air resistance
Balances weight
Reach terminal velocity
Parachute
Increased air resistance