Motion And Forces

Question 1

Scalar

Answer 1

Magnituide but no direction

Question 2

Vector

Answer 2

Both magnitude and direction

Question 3

Name 3 scalar quantities

Answer 3

Speed
Distance
Temperature

Question 4

Vector quantities

Answer 4

Displacement
Velocity
Weight

Question 5

25km going east shows

Answer 5

Displacement (vector)

Question 6

Is power scalr or vector

Answer 6

Sclar

Question 7

Acceleration

Answer 7

Change in velocity/time

Final velocity squared- initial velocity squared / 2x distance

Question 8

Acceleration is a

Answer 8

Vector

Question 9

Distance

Answer 9

Final velocity squared - initial velocity squared divided by 2x acceleration.

Question 10

How to find the velocity of acceleration

Answer 10

Draw tangent on the point and use it to find gradient of the line0p

Question 11

On velocity graph distance travelled

Answer 11

The area under the lines

Question 12

Range of lab methods used for finding speed of obkects light use of light gates

Answer 12

Light gates used cause more accurate

Question 13

Speed of typicalstuff

Answer 13

Walking 1.5m/s or 3.4 mph
Run 5 or 11
Cycle 7 or 15
Car 30 or 67
Train 56 or 125
Plane 250 ot 560

Question 14

What speed is acceleration in free fall

Answer 14

10m/s squared

Question 15

Newton 1st law

Answer 15

Resultant force required to change the motion of object

Question 16

Newton 2nd law

Answer 16

Non -zero resultant force acts on
object then cause to accelerate

Resulatant force = mass x acceleration

Question 17

Newton 2nd law is a change in acceleration but not speed why

Answer 17

Cause we change direction and acceleration vector

Question 18

Inertia

Answer 18

Newton 1st law

Question 19

Initial masd

Answer 19

How difficult for object to change in velocity
Higher the initial mass the higher the inertia

Question 20

Newton 3rd law

Answer 20

When 2 forces interact the forces they exert on eachother are equal(force) and opposite(direction)

Question 21

Acceleration

Answer 21

Force/mass

Question 22

When ibject pushes back with euqal and opposite force

Answer 22

Normal contact force

Question 23

How do we measure weight

Answer 23

Measure the force pulling object to centre of earth
Blancing with a known force
If statiokary known force is same as weight

Question 24

Measuring acceleration experiment

Answer 24

Trolley
Ramp
Masses
Card
Balamce
2 light gates
Clamp and stands

Method
Adjust the slope of the ramp so it just starts moving at c velocity
Length of card and put it in results
Weigh trolley and card
Set up light gets one at start and end
Add mass in contant intervals
Release the trolley to measure velocity and time takes

Question 25

Centripetal force

Answer 25

Net force that acts upon object to keep moving in circular path

Question 26

Momentum

Answer 26

Mass x velocity
Vector

Question 27

Conservation of momenutm principle

Answer 27

Total momentum before = total momentum after

Question 28

Velocity in terms of momentum

Answer 28

Momentum /mass

Question 29

Force in terms of momentum

Answer 29

Change in momentum /time

Question 30

Crumple zome

Answer 30

Zones wich crumple to reduce momentum

Question 31

Seat belt

Answer 31

Slow momentum

Question 32

Air bags

Answer 32

Slow momentum

Question 33

Change in momentum

Answer 33

Mass x final velocity- mass x inital velocity