Question 1

what is displacement?

Accepted Answer

a distance in a certain direction

Answer

a distance without direction

Question 2

what is a scalar quantity?

Accepted Answer

a quantity with size and no direction

Answer

a quantity with size and direction

Question 3

what is a vector quantity?

Accepted Answer

a quantity with size and direction

Answer

a quantity with size and no direction

Question 4

what are examples of scalar quantities?

Accepted Answer

speed, distance, time, mass, energy and power

Answer

velocity, displacement, acceleration, force, momentum, weight and gravitational field strength

Question 5

what are examples of vector quantities?

Accepted Answer

velocity, displacement, acceleration, force, momentum, weight and gravitational field strength

Answer

speed, distance, time, mass, energy and power

Question 6

how do we represent vector quantities?

Accepted Answer

the direction and length of arrows

Answer

the direction and length of bars

Question 7

what is Newton's third law of motion?

Accepted Answer

when two objects interact with each other, they exert equal and opposite forces on each other

Answer

when the resultant force on an object is 0N the object is stationary or moving in a constant speed

Question 8

how do you go from mass to weight?

Accepted Answer

x it by the gravitational field strength (9.8)

Answer

/ it by the gravitational field strength (9.8)

Question 9

what is Newton's first law of motion?

Accepted Answer

when the resultant force on an object is 0N the object is stationary or moving in a constant speed

Answer

when two objects interact with each other, they exert equal and opposite forces on each other

Question 10

what is the centre of mass?

Accepted Answer

the point at which its mass can be thought of as being concentrated

Answer

the point at which its weight can be thought of as being concentrated

Question 11

where is the centre of mass of a symmetrical object?

Accepted Answer

it is along the axis of symmetry

Answer

it is along the centre of symmetry

Question 12

how do you figure out where the centre of mass of an irregular object is?

Accepted Answer

when it is freely suspended, it comes to rest with its centre of mass directly underneath the point of suspension

Answer

when it is freely suspended, it comes to rest with its centre of mass diagonally underneath the point of suspension

Question 13

what does resolving forces mean?

Accepted Answer

finding perpendicular components that have a resultant force that is equal to the force

Answer

finding parallel components that have a resultant force that is equal to the force

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