Foundations

Question 1

What is displacement

Answer 1

The size of the dinstance

Question 2

What is the displacement when you travel from point A-B-C-A

Answer 2

0

Question 3

What is the resultant of two or more vectors

Answer 3

The single vector that produces the same effect as all the vectors

Question 4

If a system is in equilibrium what must the weight equal to

Answer 4

The sum of the vertical components

Question 5

How does displacement of a particle give us more info than the distance travelled of prical

Answer 5

Displacement will tell us the distance travelled and also the direction of motion of particle

Question 6

What quantity is pressure

Answer 6

Scalar

Question 7

State what direction of the mass will travel if ball was hung from a string

Answer 7

Downwards

Question 8

A diagram shows forces acting on a seat of a swig that are in equilibrium. What is the net force on the seat

Answer 8

0N the system is in equillibrium

Question 9

A gardener rolls the grass and moves the roller at a steady speed . What is the net force in the horizontal direction?

Answer 9

0N as the roller is moving at constant speed

Question 10

A stunt person is holding on top a rope in the air. This makes the rope on either side have an angle of 5 degrees to the horizontal. What would happen if this angle is made to be 0?

Answer 10

The tension in the rope will become infinite and therefore the rope will break

Question 11

Using the rules of combining uncertainties, what should you do is the formula is in the form - AxB or A/B

Answer 11

Add the percentage uncertainties together

Question 12

Using the rules of combining uncertainties, what should you do is the formula is in the form - A^2

Answer 12

Double the percentage uncertainty of A

Question 13

Using the rules of combining uncertainties, what should you do is the formula is in the form - A^n

Answer 13

Multiply the percentage uncertainty by n

Question 14

Using the rules of combining uncertainties, what should you do is the formula is in the form - A+b or A-B

Answer 14

Add the absolute uncertainty of A+B together

Question 15

What is centripetal force?

Answer 15

A force that acts on a body in a circular path and is directed towards the centre around which the body is moving

Question 16

A tourist is standing in a cubicle of the London eye. They have the weight force, normal contact force, and a horizontal force between them and the the ground. Explain why the horizontal force is necessary for centripetal force.

Answer 16

For circular motion there must always be a resultant force towards the centre, this can only provided by a frictional force and can not b provided by the vertical forces only. It needs both horizontal and vertical forces in order to have a resultant force.

Question 17

What is electric potential

Answer 17

The amount of work needed to move a unit of charge from a reference point to a specific point against an electric field.

Question 18

Equation for w1 or f1 the force acting down the slope ( parallel to slope)

Answer 18

W1= weight x sin(theta)

Question 19

Equation for w2 acting against the slope (perpendicular to slope )

Answer 19

W2= weight x cos(theta)

Question 20

How do you find uncertainty

Answer 20

Find the range and divide by 2

Question 21

How do you find percentage uncertainty

Answer 21

Divide uncertainty by measured value and x 100

Question 22

What is absolute uncertainty

Answer 22

The actual uncertainty given