Physics

Question 1

What is the formula for speed?

Answer 1

Distance / time = speed

Question 2

What is velocity?

Answer 2

Speed with a set direction

Question 3

What is the difference between a velocity-time and a distance time graph?

Answer 3

In a velocity time graph a diagonal line repents acceleration or deceleration and a stariaght line shows constant velocity but in a distance time graph a straight line shows it has stopped and a diaganel line is movement.

Question 4

What is terminal velocity?

Answer 4

The maximum speed an object can reach when falling

Question 5

How do you measure gravitational force?

Answer 5

gravitational force = wight / mass

Question 6

Name Newton’s 1st law?

Answer 6

An object will not move unless influenced by a force

Question 7

What is stopping distance?

Answer 7

Stopping distance has two parts:

1) thinking distance - this is the time it takes for a drivers foot to hit the pedal after the see the object.
2) Breaking Distance - this is the amount of time it takes the car to fully stop

Question 8

What is hookes law?

Answer 8

When a load is doubles so is the extension of the spring

Question 9

What is meant by an elastic object?

Answer 9

An object that when changes will go back to its a original shape

Question 10

What is meant by an plastic object?

Answer 10

An object that when changes will not go back to its a original shape

Question 11

How do you figure out force from acceleration and mass?

Answer 11

F= m x a

Question 12

How do you figure out the spring constant?

Answer 12

Force / extension = spring constant

Question 13

What is a vector quantity?

Answer 13

Quantities measured with number and units with a set direction

Question 14

What is a scalar quantity?

Answer 14

Quantities measured with numbers and units

Question 15

Give an 2 examples of:

1) vector quantity
2) scalar quantity

Answer 15

1) velocity, acceleration, force, weight

2) mass, length, speed, teamprsture

Question 16

on a distance-time graph what is one the x axis and what is on the y?

Answer 16

x=time

y=distance

Question 17

How do you figure out average speed?

Answer 17

distance/time taken

Question 18

how do you figure out acceleration (a) from change in velocity (v-u) and time taken (t)?

Answer 18

change in velocity/time taken
or
a= (v-u) / t

Question 19

how do you figure out acceleration from a velocity time graph?

Answer 19

the gradient

Question 20

on a velocity time graph how do you figure out distance?

Answer 20

the area under the line will be the distance

Question 21

if a car is driving with 200N of force and friction is supplying 150N of force what is the resultant force?

Answer 21

50N forward

Question 22

If the average gravitational pull on a planet is 5 and my mass is 60kg how much is my wight?

Answer 22

300N

Question 23

What are some factors effecting vehicle stopping distance?
name at least 2:
a) road conditions
b) driver conditions
c) car conditions

Answer 23

a) wet roads, mist, snow, icy roads.
b) drunk, under the influence of drugs, fatigue (tiredness), reaction time
c) worn out tyres, worn out brakes, speed, mass

Question 24

how do you figure out final speed?

Answer 24

(final speed)squared = (initial speed)squared + (2 x acceleration x distance moved)