chap 8 & 9

Question 1

just like force how can you work out Magnitude of resultant velocity

Answer 1

(V1 + V2)^1/2

Question 2

how can you work out initial direction

Answer 2

By looking at what the first force acting on the object is

Question 3

what is the (motive force + resistive force) =

Answer 3

resultant force (the force of the thruster’s during acceleration)

Question 4

sketch acceleration on a distance time graph

Answer 4

parabolic curve

Question 5

Answer 5

Question 6

Answer 6

Question 7

when sketching force diagrams what should you remember

Answer 7

.friction
.weight
.tension

Question 8

Answer 8

Question 9

Answer 9

constant velocity

Question 10

work done on a slope

Answer 10

Work=(mg⋅sin(θ))×d

Question 11

weight on inclined plane

Answer 11

vertical

Question 12

Newtons first law

Answer 12

A body will remain at rest or move with constant velocity unless acted on by a resultant force

Question 13

If object is moving at constant speed then how do the forces acting on echother compare

Answer 13

they are equal to eachother e.g The forces to the left = the forces to the right

Question 14

Newtons second law

Answer 14

The resultant force on an object is equal to its rate of change in momentum. or in other words The resultant force on an object with constant mass is directly proportional to its acceleration.

Question 15

Answer 15

Question 16

Newtons third law

Answer 16

If body A exerts a force on body B, then body B will exert a force on body A of equal magnitude but in the opposite direction
in other words (For every action is an equal and opposite reaction) don’t say the one in brackets though

Question 17

Is this Newtons 3rd law and why

Answer 17

Question 18

Is this Newtons 3rd law and why

Answer 18

Question 19

Is momentum a vector or scalar

Answer 19

vector

Question 20

what is the relationship between force and momentum

Answer 20

• final p - before p

Question 21

Answer 21

Question 22

to calculate Newtons, hat mass do you need

Answer 22

kg

Question 23

what is impulse equal to

Answer 23

change in momentum

Question 24

on a force time graph what does the area give you

Answer 24

impulse

sometimes areas don’t look the same but they are, they might try this Q