Forces

Question 1

what is a scalar quantity?

Answer 1

has a magnitude only

Question 2

what is an example of a scalar quantity?

Answer 2

temperature, speed, energy

Question 3

what is a vector quantity?

Answer 3

has a magnitude and a direction

Question 4

what is an example of a vector quantity?

Answer 4

displacement, momentum, acceleration, velocity

Question 5

what represents vector quantites?

Answer 5

an arrow

Question 6

what does the length of a vector arrow show?

Answer 6

shows the magnitude

Question 7

what does the direction of a vector arrow show?

Answer 7

the direction the vector quantity is acting

Question 8

what quantity is force?

Answer 8

vector

Question 9

what is a contact force?

Answer 9

forces that act when two objects are physically touching

Question 10

what is a non contact force?

Answer 10

forces that can act from a distance/when they are not touching

Question 11

what are examples of a contact force?

Answer 11

friction, air resistance, tension, upthrust, normal contact force

Question 12

what are examples of non contact forces?

Answer 12

gravitational force, electrostatic force, magnetic force

Question 13

what is gravity?

Answer 13

a force of attraction between all masses, the force of gravity close to Earth is due to the gravitational field around the planet

Question 14

what is the mass of an object?

Answer 14

the mass of an object is related to the amount of matter it contains. its constant

Question 15

what is the weight of an object?

Answer 15

force acting on an object due to gravity

Question 16

what does the weight of an object depend on?

Answer 16

depends on the gravitational field strength where the object is and is directly proportional to its mass

Question 17

what is the equation for weight?

Answer 17

weight(N) = mass(kg) x gravitational field strength(n/kg)

Question 18

what is a resultant force?

Answer 18

when more than one force acts on an object, these forces can be seen as a single force that has the same effect as all the forces acting together

Question 19

what is work done?

Answer 19

when a force causes an object to move and it requires energy to move

Question 20

what is the workdone equation?

Answer 20

workdone = force x distance

Question 21

what is elasticity?

Answer 21

the ability to stretch or compress an object

Question 22

what is elastically deformation?

Answer 22

if a object returns to its original shape after the forces have been removed

Question 23

what is inelastically deformation?

Answer 23

if the object does not return to its original shape after the forces have been removed

Question 24

what is newtons first law?

Answer 24

if a resultant force is stationary or a moving objects resultant force is 0, the object will either remain stationary or remain at constant speed

Question 25

what is newtons second law?

Answer 25

the second law states that the acceleration of an object is dependant on the force acting upon the object and the mass of the object

Question 26

what is the equation for resultant force?

Answer 26

resultant force (N) = mass (kg) x acceleration (m/s^2)

Question 27

what is newtons third law?

Answer 27

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

Question 28

what is inertia? (HT)

Answer 28

the tendency for objects to continue in the same state of motion

Question 29

what is the equation for inertial mass? (HT)

Answer 29

inertial mass = force / acceleration