Unit 2a

Question 1

How do to you calculate speed form a distance-time graph

Answer 1

Speed=distance/time

Question 2

What is the acceleration of a object that has has been accelerated form a stand still to 14m/s in 0.4 seconds

Answer 2

Acceleration= change in velocity/time taken

Answer: 35

Question 3

What is the difference between mass and weight and what are they measured in

Answer 3

Mass it the amount of stuff in a object and is measured in kilograms.

Weight is the force of gravity acting on a object. measured in Newtons.

Question 4

How do you calculate the weight of an object form the mass and the gravitational field strength

Answer 4

Weight=mass* gravitational field strength

Question 5

If an object has zero resultant force on it, can it be moving, and can it be accelerating

Answer 5

An object can still move with 0 resultant force acting upon it as it would be traveling at a constant speed. This also means that it will not be accelerating

Question 6

What is the formula for finding the resultant force of an object

Answer 6

Resultant force(in newtons)= mass (Kg)*acceleration (m/s^2)

Question 7

What is the difference between speed and velocity

Answer 7

Speed is how fast you are going and velocity is speed and direction.

Question 8

What are all the factors that effect the stopping distance for a car

Answer 8

The speed you are going.
The time it takes to apply the brakes. 
The quality of the brakes.
Quality of the tyres. 
The amount of friction the road has

Question 9

What is the formula for work done for the amount of force used over a distance

Answer 9

Work (w)= force(f) * distance(d)

Question 10

What is the formula for gravitational potential energy

Answer 10

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