Question 3.11: A car crashes head-on into a brick wall. Use the idea of ine...

Cambridge International AS and A Level Physics Coursebook

A car crashes head-on into a brick wall. Use the idea of inertia to explain why the driver is more likely to come out through the windscreen if he or she is not wearing a seat belt.

The blue check mark means that this solution has been answered and checked by an expert. This guarantees that the final answer is accurate.
Learn more on how we answer questions.

Related Answered Questions

Question: 3.12

If you drop a large stone and a small stone from the top of a tall building, which one will reach the ground first? Explain your answer. ...

Verified Answer:

The large one; its weight is greater, so it reache...

Question: 3.17

Imagine throwing a shuttlecock straight up in the air. Air resistance is more important for shuttlecocks than for a tennis ball. Air resistance always acts in the opposite direction to the velocity of an object. Draw diagrams to show the two forces, weight and air resistance, acting on the ...

Verified Answer:

Question: 3.5

Determine the base units of: a pressure ( = force/area) b energy (= force × distance) c density (= mass/volume) ...

Verified Answer:

a Pressure

= \frac{F}{A}

, F = ma, s...

Question: 3.18

Describe one ‘Newton’s third law pair’ of forces involved in the following situations. In each case, state the object that each force acts on, the type of force and the direction of the force. a You step on someone’s toe. b A car hits a brick wall and comes to rest. c A car slows down by applying ...

Verified Answer:

a Force up on your foot and down on the footc that...

Question: 3.16

Draw a diagram to show the forces which act on a car as it travels along a level road at its top speed. ...

Verified Answer:

Question: 3.15

Name these forces: a the upward push of water on a submerged object b the force which wears away two surfaces as they move over one another c the force which pulled the apple off Isaac Newton’s tree d the force which stops you falling through the floor e the force in a string which is holding up an ...

Verified Answer:

a Upthrust b Friction c Weight (= force of gravity...

Question: 3.WE.6

The maximum forward force a car can provide is 500 N. The air resistance F which the car experiences depends on its speed according to F = 0.2v², where v is the speed in ms^−1. Determine the top speed of the car. ...

Verified Answer:

Step 1 From the equation F = 0.2 v², you can see t...

Question: 3.WE.5

A car of mass 500kg is travelling along a flat road. The forward force provided between the car tyres and the road is 300 N and the air resistance is 200 N. Calculate the acceleration of the car. ...

Verified Answer:

Step 1 Start by drawing a diagram of the car, show...

Question: 3.14

Skydivers jump from a plane at intervals of a few seconds. If two divers wish to join up as they fall, the second must catch up with the first. a If one diver is more massive than the other, which should jump first? Use the idea of forces and terminal velocity to explain your answer. b If both ...

Verified Answer:

a The lighter one: lower terminal velocity. b Turn...

Question: 3.13

In a race, downhill skiers want to travel as quickly as possible. They are always looking for ways to increase their top speed. Explain how they might do this. Think about: a their skis b their clothing c their muscles d the slope. ...

Verified Answer:

a Lubricate the skis to reduce friction. b Wear ti...