Y7

Question 1

How do you calculate speed, distance or time if you know two of them?

Answer 1

Speed can be calculated using the formula speed = distance / time
Time can be calculated using the formula time = distance / speed
Distance can be calculated using the formula distance = speed x time

Question 2

What is the unit for speed?

Answer 2

If distance is in metres and time in seconds then the universe speed is M/S
Distance is in kilometres and time in hours then the unit for speed is km / h

Question 3

what is weight?

Answer 3

The gravitational force of Attraction you experience because you are in Earth’s gravitational field is also known as your weight. Weight is a force and is measured in newtons (n).

Question 4

What is mass?

Answer 4

mass is the mount of material that makes you up and is measured in kg

Question 5

What is Newton’s First Law?

Answer 5

Newton’s First Law tells us that if no resultant force acts on an object then that objects motion will not change; it will either stay still or, it is already moving, then or carry on moving at a steady speed. If there is a resultant force acting on an object than the object’s motion will change.

Question 6

How can you calculate an object’s weight?

Answer 6

Your weight on earth can be calculated by using the following formula weight = mass x 10

Question 7

What happens to an object’s motion if the resultant force acts on it?

Answer 7

A resultant force in the direction in which an object is moving will cause it to speed up. A resultant force in the opposite direction to the way in object is moving will cause it to slow down.