Forces Extra

Question 1

A force is….

Answer 1

An attraction or repulsion between objects

Question 2

All masses

Answer 2

Attract each other

Question 3

All forces are

Answer 3

Interactions

Question 4

The force of friction

Answer 4

Ian electromagnetic interaction between charges in surfaces

Question 5

Friction is

Answer 5

The push and pull of forces as they slide past each other

Question 6

A vector is

Answer 6

Any quantity that has a direction

Question 7

Example of a vector

Answer 7

Force

Question 8

Vectors in opposite directions

Answer 8

Cancel out

Question 9

When forces are balanced

Answer 9

There is no acceleration

Question 10

When forces are balenced

Answer 10

Th re is no change in speed or direction of motion (Newton’s 1st law)

Question 11

An example of Newton’s first law

Answer 11

Someone standing on the ground, the floor pushes upward, gravity pulls down. Or a skydiver, air resistance up, weight down

Question 12

If a plane has unbalanced forces

Answer 12

It slows down and accelerates in a negative direction ;;;;

Question 13

The acceleration of an object

Answer 13

Depends on the force and mass of the object (Newton’s second law)

Question 14

1000 times the force acting on 1000 times the mass

Answer 14

Results in the same acceleration

Question 15

If there is no net force on an object, it does not change its velocity

Answer 15

Momentum is conserved

Question 16

If there is a force on an object, it accelerates

Answer 16

Momentum changes

Question 17

When two objects interact, the force on them is equal and opposite

Answer 17

The momentum change of the two objects is equal and opposite in direction. So total momentum is conserved