P8

Question 1

What are examples of scalar quantities

Answer 1

Mass

Temperature

Speed

Distance

Time

Question 2

What is a scalar quantitie

Answer 2

Scalar quantities have only magnitude (size) and no direction

Question 3

What are examples of vector quantities

Answer 3

Displacement

Weight

Force

Acceleration

Velocity

Question 4

What are vector quantities

Answer 4

Vector quantities have both magnitude and direction

Question 5

How do we represent vector quantities

Answer 5

Using an arrow

The length represents the magnitude Of the vector

The direction represents the direction of the vector

Question 6

What is a force

Answer 6

It’s the pushing or pulling of an object with another object

All forces have both magnitude and direction so it’s a vector quantities

Question 7

What is a contact force what are some examples

Answer 7

The two objects are physically touching such as friction , air resistance

Question 8

What’s a normal contact force

Answer 8

Such as a downward force of a lamp on an upward force of a table which is normal. This can only happen when two objects are in direct contact

Question 9

What are non-contact forces

Answer 9

The two objects are physically separated such as gravitational force , electrostatic force , magnetic force

Question 10

What is Newton’s third law of motion

Answer 10

Two objects interact with each other , they exert equal an opposite forces on each other

Question 11

What’s the relationship between mass and weight

Answer 11

Directly proportional

Question 12

What is the centre of mass

Answer 12

This is the point of an object where it’s mass can be thought of as being concentrated

Question 13

How do you work out the resultant force

Answer 13

You minute the larger force by the smaller force

Question 14

Parallelogram of forces

Answer 14

Use the magnitude and create two lines with the angle in between. Then carry on this line and create the angle at the point at the end of both lines until they meet again. Measure the point to point which is the resultant force.

Question 15

Resolving force

Answer 15

Right angle with a diagonal in the middle

Question 16

Work is what

Answer 16

This is a measure of energy transfer so the unit of work is the joule

When a force of 1N moves an object by 1m then 1J of work is done

Question 17

What’s Newton’s first law

Answer 17

If a resultant force acting on a stationary object is 0 then it will remain stationary

Of a resultant force acting on a moving object is 0, then the object will continue to move in the same direction at the same speed (with the same velocity)

Question 18

What’s Newton’s second law

Answer 18

The acceleration of an object is proportional to the resultant force acting on an object hit its inversely proportional to the mass of the object

Question 19

What is equilibrium

Answer 19

The resultant force is 0

The force acting on the object has no overall effect

If the lines of action. If the forces add parallel the sun if the forces in one direction must be equal to the sum of the forces in the opposite direction. This means that the resultant force in the object is 0