Mechanics

Question 1

Displacement

Answer 1

Metre

Question 2

Velocity

Answer 2

M/s

Question 3

Acceleration

Answer 3

M/s/sMS(^-2)

Question 4

Force/weight

Answer 4

N

Question 5

Distance

Answer 5

M

Question 6

Speed

Answer 6

M/S MS^-1

Question 7

Time

Answer 7

S

Question 8

Mass

Answer 8

Kg

Question 9

Speed is the…

Answer 9

Magnitude of velocity vector

Question 10

Distance is….

Answer 10

Magnitude of displacement vector.

Question 11

Particle

Answer 11

Dimensions of the object are negligible
1. mass at single point
-rotational forces + air resistance ignored

Question 12

Rod

Answer 12

All dimensions but 1 one are negligible
-No thickness
-mass concentrated along a line
-rigid (don’t bend)

Question 13

Inextensible string

Answer 13

Don’t stretch under load
Means- acceleration same in any connected objects.

Question 15

On a displacement time graph…

Answer 15

Gradient represents velocity
If straight line V constant

Question 16

Average velocity

Answer 16

Displacement form starting/ time taken

Question 17

Speed

Answer 17

Distance / time

Question 18

If in a straight diagonal line

Answer 18

Displacement increase at constant rate over time + object moving with constant velocity

Question 19

If in a curved line that slowly increases

Answer 19

Displacement increase at greater rate as time increase.

Question 20

Velocity

Answer 20

Km H (^-1)

Question 21

If there no change in displacement

Answer 21

The line is straight
Velocity is 0

Question 22

If returns to starting point

Answer 22

Displacement is zero

Question 23

When object reached highest point on displacement time graph..

Answer 23

Velocity is zero

Question 24

From the time ball is thrown to the time it reaches highest point…the motion

Answer 24

Velocity of ball is + (upwards) and decreases (decelerating) until reach 0 at highest point.

Question 25

Air resistance negligible

Answer 25

Ignore frictional effects of air on football

Question 26

Football modelled as a particle

Answer 26

Ignore rotational effect of external forces acting on it + air resistance and effects of air resistance and assume all the mass acts as single point

Question 28

Vector

Answer 28

I/J I is x direction J is y

Question 29

AB has vector 3i + 4j BC has vector 5i - 12j What is the magnitude of the total displacement form A to C

Answer 29

Add the i together Then add the j together Then do Pythagoras Square root of i^2 + j^2

Question 30

Total distance the man has walked from A to C

Answer 30

Add i + j and do Pythagoras Same with the second one Then add together

Question 31

SUVAT

Answer 31

S= distance U= initial velocity V= final velocity A = acceleration T= time

Question 32

V =

Answer 32

U + AT

Question 33

S =

Answer 33

(U+V)/2 x T

Question 34

S =

Answer 34

UT + 0.5 x A x T^2

Question 35

S=

Answer 35

VT - 0.5 x A x T^2

Question 36

V^2 =

Answer 36

U^2 + 2as