Forces Yr10

Question 1

What are Forces

Answer 1

A force is a push, twist or pull

Question 2

Can a force be seen

Answer 2

No, but you can see its effects on objects

Question 3

How do Forces work together

Answer 3

Forces work in Pairs. There is always a opposite force going against it.

Question 4

What are the forces and their direction

Answer 4

Support - Up

Weight - Down
Gravity - Down

Friction, Air resistance and Drag - Backwards

Thrust/Forward - Forwards

Question 5

What is weight

Answer 5

Downwards force due to Gravity

Question 6

What is Upthrust

Answer 6

Upwards force exerted on an object in water. This is the support force in water

Question 7

What is Friction

Answer 7

Resistive force due to 2 objects in contact that opposes motion by slowing objects down.

Question 8

What is Air resistance

Answer 8

Resistive force due to moving through air

Question 9

What is Lift

Answer 9

Force that uses motion to make an objetc rise. Lift is the support force for air.

Question 10

What is a support force

Answer 10

The upward force that balances the weight of an object on a surface is called the support force. A support force is often called the normal force. An example is a book on a shelf. The shelf is exerting a support force on the book by holding it up. IT IS ANY FORCE THAT MAKES AN OBJECT STAY UP OR GO UP

Question 11

What is Newton’s first law

Answer 11

AN object will remain at rest or constant uniform motion in a straight line unless acted upon by an external force.

Question 12

What does Friction cause

Answer 12

Heat and wear and tear is generated at the point of contact

Question 13

What are balanced forces

Answer 13

Balanced forces are when all opposite forces are equal.

This means the object if STOPPED, will remain stopped

This means if the object is MOVING, it will move at a constant speed in a straight line

This is called equilibrium

Question 14

What are unbalanced forces

Answer 14

Unbalanced Forces are when the opposite forces are not equal.

This means the speed of the object will change and accelerate in the direction with the higher opposite force

It means the direction of the motion of the object will change to the direction with the higher opposite forces

Question 15

What is the sum effect of the opposite force

Answer 15

It is the resultant force and is calculated by working out the DIFFERENCE between the opposite forces.

Question 16

What is terminal velocity

Answer 16

Terminal velocity is when drag and weight are equal so the object travels at a constant speed which is the fastest it can go.

Question 17

Difference between speed and velocity

Answer 17

Speed = how fast you are going
Velocity = speed in a given direction