Forces at work

Question 1

Magnets with the same poles…

Answer 1

Repel

Question 2

A scalar quantity has…

Answer 2

only magnitude (size)

Question 3

A vector quantity has…

Answer 3

both magnitude (size) and direction

Question 4

Give an example of a vector quantity

Answer 4

Force
Velocity
Displacement

Question 5

Give one example of a scalar quantity

Answer 5

Speed
Distance
Mass

Question 6

I have 2N of force pulling forwards and 5N of force pulling backwards, what the resultant force

Answer 6

The resultant force is 3N backwards

Question 7

I have 2N of force pulling forwards and 5N of force pulling forwards, whats the resultant force?

Answer 7

The resultant force is 7N forwards

Question 8

What is the equation for work done (J) if you have force (N) and distance (m)

Answer 8

Work done (J) = Force (N) * Distance (m)

Question 9

What is the equation for gravitational potential energy

Answer 9

GPE = mass (N)Gravityheight (m)

Question 10

What is gravity equal to on earth?

Answer 10

9.8/10

Question 11

What is the equation for Kinetic Energy?

Answer 11

Kinetic Energy (KE) = 0.5mass (M)Velocity^2 (V^2)

Question 12

What is the equation for work done (J) using Power (w) and Time (s)

Answer 12

Work done (J) = Power (w)*time (s)

Question 13

If a microwave uses 400w for a minute, how much work is done?

Answer 13

400*60=24000J (or 2.4x10^4J)

Question 14

Work out the GPE of a plane if its 200m in the air and has a mass of 50N.

Answer 14

2009.850=98000
OR
2001050=100000

Question 15

GPE is equal to…

Answer 15

Kinetic Energy