Chapter 2 - Mechanics (2.1)

Question 1

Speed Equation?

Answer 1

Speed = Distance/Time

Question 2

Velocity Equation?

Answer 2

Displacement/Time

Question 3

Acceleration Equation?

Answer 3

(Final Velocity - Initial Velocity)/Time Taken

Question 4

What does the gradient represent in a distance-time graph?

Answer 4

Speed (d/t)

Question 5

What does the gradient represent in a displacement-time graph?

Answer 5

Velocity (Displacement/time)

Question 6

What does the gradient represent in a velocity-time graph?

Answer 6

Acceleration (Change in V/Time)

Question 7

What does the area below a velocity time graph represent?

Answer 7

Distance Travelled (v x t)

Question 8

What can you use to work out the resultant of 2 perpendicular forces?

Answer 8

Pythagoras theorem

Question 9

When can we use free body diagrams?

Answer 9

Isolated objects

Question 10

Equation for moments?

Answer 10

Moment(Nm)=Force (N) x perpendicular dist from pivot. (m)

Question 11

Where is the centre of gravity for a regular shape?

Answer 11

The true centre of the shape

Question 12

How do you find the centre of gravity for an irregular shape?

Answer 12

Find where its weight is acting the most.

Question 13

Newton’s first law?

Answer 13

If an object is stationary it will remain stationary unless reacted on by a resultant force

Question 14

Newton’s second law?

Answer 14

Force = Mass x Acceleration

Question 15

Newton’s third law?

Answer 15

Every action has an equal and opposite reaction.

Question 16

When can you use S=d/t and V=displacement/time

Answer 16

When there is zero acceleration

Question 17

When can you use suvat equations?

Answer 17

When acceleration is constant

Question 18

What does each stand for in SUVAT

Answer 18

s= displacement
u=initial velocity
v=final velocity
a=acceleration
t=time taken

Question 19

Equation for displacement with v?

Answer 19

s= ((u+v)/2) x t

Question 20

Equation for final velocity?

Answer 20

v= u + at

Question 21

Equation for displacement without v?

Answer 21

s= ut + 1/2at^2

Question 22

Equation for time?

Answer 22

t= 2s/u+v

Question 23

Equation for v^2?

Answer 23

v^2=u^2 + 2as

Question 24

For vertical components what must be used?

Answer 24

a=9.81

Question 25

For Horizontal components what can be used?

Answer 25

v=d/t (once left ground)