Mechanics

Question 1

Scalar Quantities

Answer 1

Quantities that have only a magnitude and no direction.

Question 1

Vector Quantities

Answer 1

Quantities that have both a magnitude and direction

Question 2

SUVAT Equations

Answer 2

v = u +at

s = ut + 1/2at^2

v^2 = u^2 +2as

s = 1/2(u+v)t

Question 3

SUVAT Equation containing v, u, a, t

Answer 3

v = u +at

Question 4

SUVAT Equation containing s, u, t, a

Answer 4

s = ut + 1/2at^2

Question 5

SUVAT Equation containing v, u, a, s

Answer 5

v^2 = u^2 +2as

Question 6

SUVAT Equation containing s, u, v, t

Answer 6

s = 1/2(u+v)t

Question 7

Explain the relationship between the horizontal and vertical component

Answer 7

The horizontal and vertical component of the velocity are independent of each other

Question 8

Velocity definition

Answer 8

Rate Of change of displacement

Question 9

Speed definition

Answer 9

Rate of change of distance travelled

Question 10

Acceleration definition

Answer 10

Rate of change of velocity

Question 11

Newton’s first law

Answer 11

An object will stay at rest or continue to move at a constant speed in the same direction unless acted upon by a resultant force

Question 12

Newton’s Second law

Answer 12

F = ma

Question 13

Newton’s Third law

Answer 13

For every action there is an equal and opposite reaction

Question 14

Conditions for newton’s third law pairs

Answer 14

• Same magnitude of force
• Same type of force
• Forces acting in opposite directions
• Forces acting on different objects

Question 15

GPE Formula

Answer 15

ΔE grav = m g Δh

Question 16

Kinetic energy formula

Answer 16

E k = 1/2mv^2

Question 17

Work done equation

Answer 17

Δw = F Δs

Question 18

Two equations for power

Answer 18

P = W/t
P = Fv

Question 19

Work done definition

Answer 19

Energy transfer

Question 20

Power definition

Answer 20

The rate at which work is done