3.4.1.5 - Newton's Laws Of Motion

Question 1

What must occur in order for an object to remain at constant velocity?

Answer 1

Either no resultant force or no forces acting on the object.

Question 2

What is Newton’s second law?

Answer 2

F=ma

Question 3

What is force proportional to?

Answer 3

Both mass and acceleration.

Question 4

What is acceleration proportional to?

Answer 4

1/mass

Question 5

Effects of icy roads?

Answer 5

Increase braking time as friction reduced.

Question 6

Effects of condition of tyres.

Answer 6

Increases braking distance as if tread too small, friction is reduced.

Question 7

Effects of alcohol?

Answer 7

Thinking distance increases and reaction time increases.

Question 8

Effects of mobile phones?

Answer 8

Thinking distance increases as it is a distraction.

Question 9

Effects of weather?

Answer 9

Visibility reduced therefore thinking distance increases.

Question 10

Effects of heavier vehicle?

Answer 10

Stopping distance increases as more force required to slow vehicle.

Question 11

Effects of condition of brakes?

Answer 11

Increases braking distance as if broken they would be less responsive and therefore less effective.

Question 12

Vehicle bumpers?

Answer 12

Increase time of impact and therefore force on person is reduced.

Question 13

Crumple zones?

Answer 13

Increases time of impact and therefore reduces force.

Question 14

Seat belts?

Answer 14

Restrain wearer and therefore increase time of impact as weaker doesn’t hit the front of the car at high speed?

Question 15

Collapsible steering wheel?

Answer 15

Impact force is reduced as it collapses.

Question 16

Airbags?

Answer 16

Reduces force on person as cushions and increases time of impact. Also has a large surface area so force is spread over a large area.