forces and motion-science

Question 1

What is the correct way to calculate speed

Answer 1

distance/time

Question 2

what are the units for speed

Answer 2

meters per second (M/S)

Question 3

A horizontal line on a distance time graph means the object has…

Answer 3

stopped moving

Question 4

A steep straight line on a distance/time graph means what

Answer 4

The object is travelling fast

Question 5

What does the curve on a distance time graph mean

Answer 5

acceleration

Question 6

A word to describe when an object is slowing down

Answer 6

Deceleration

Question 7

How many stops where there in a journey with two horizontal lines

Answer 7

2

Question 8

Calculate the resultant force of an object being pulled to the right by a force of 30N and 60N

Answer 8

90N to the right

Question 9

calculate the resultant force of an object being pulled 10N to the left and 30N to the right

Answer 9

20N to the right

Question 10

complete the sentence, if the resultant force is zero the object will…

Answer 10

remain at a constant velocity

Question 11

what does the term resultant force mean

Answer 11

The overall force

Question 12

If the resultant force is not zero the object will _____ in the ______ of the resultant force

Answer 12

accelerate, direction

Question 13

Both friction and drag cause objects to…

Answer 13

slow down

Question 14

What happens to the air resistance as the object increases speed

Answer 14

Air resistance increases

Question 15

what is a moment

Answer 15

The turning effect of a force

Question 16

What is the correct equation to calculate a moment

Answer 16

moment=force x distance

Question 17

What is the unit of a moment

Answer 17

newton-metres (Nm)

Question 18

A lever turns about a point. What do we call this point

Answer 18

Pivot

Question 19

what happens to the effort required to lift a heavy object as more pulleys are added

Answer 19

effort decreases