3- Force And Speed

Question 1

what happens when and unbalanced force acts IN the direction in which something is moving?

Answer 1

the object speeds up / accelerates

Question 2

what happens when an unbalanced force acts in the opposite direction to the one the object is moving?

Answer 2

it slows down / decelerates

Question 3

how do you increase friction on a road?

Answer 3

if you sprinkle a few pinches of sand, salt or sugar onto the road, the friction will increase dramatically.

Question 4

what happens when the driving force is larger than the friction force on a car?

Answer 4

the car speeds up, pushing the car forwards through the wheels.

Question 5

what happens when the friction force is larger than the driving force on a car?

Answer 5

the car slows down

Question 6

what happens when the driving force is equal to the friction force on a car?

Answer 6

the car goes at a constant speed

Question 7

label diagram

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  - ----------                           -----------
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Answer 7

I
                         REACTION
     FRICTION  PUSH
                          WEIGHT
                                 I