Standard Grade Physics Transport. To find the average speed of a car in a race, the distance it covers and what other quantity is required? 20 1. Length.

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Presentation transcript:

Standard Grade Physics Transport

To find the average speed of a car in a race, the distance it covers and what other quantity is required? Length of the car 2.Time to cross the finish line 3.Time to cover the distance

How would you describe instantaneous speed? 1.Speed at one point 2.Speed over a large distance 15

Acceleration is defined as the rate at which the speed of a vehicle increases. What is the unit acceleration? 1.m / s 2.m 2 / s 3.m / s 2 4.ms 2 20

A car takes 4s to increase its speed from 20m/s to 32m/s. What is the car’s acceleration? m/s m/s m/s m/s 2 90

A train accelerates from 8m/s to 16m/s at a rate of 0.5m/s 2. What is the time for this to take place? s 2.0.5s 3.1.9s 4.16s 90

The speed/time graph for a car accelerating is shown. What is its acceleration? Speed(m/s) Time(s) m/s m/s m/s m/s 2

What is the distance travelled by the vehicle? 1.40m 2.80m 3.110m 4.160m Time(s) Speed(m/s)

What is the weight of a 62Kg man on Earth (g=10N/kg)? N N 3.72 N N 90

What is the gravitational field strength on the moon if a 70kg astronaut weighs 112N? N/kg N/kg N/kg N/kg 90

Which of the following situations would you want to INCREASE friction? 1.Slowing a car down 2.Speed skiing 3.Swimming 4.Air hockey 30

Which of the following describes a method of REDUCING friction? 30 1.Rubbing surfaces harder together 2.Making surfaces rougher 3.Lubrication 4.Increasing tread on tyres

What is the unbalanced force acting on the car? 300N 180N N 2.180N 3.300N 4.480N

What is the acceleration of the lorry if it has a mass of 20,000kg? 5000N 2500N m/s m/s m/s m/s 2 90

What is the correct equation used to calculate the work done (in Joules) by a force? 1.Energy x Distance 2.Force / Distance 3.Force x Distance 4.Energy / Distance 30

A mother pushes a pram with a force of 150N. How far does she push it if she uses 1200J of energy? m m 3.8.0m m 90

If a 40kg boy climbs a 12m waterslide, how much gravitational potential energy does he gain? 1.3.0J J 3.480J J 90

A crane does 4000J of work in 20s. What is its power output? x W 2.20W 3.200W x 10 4 W

What is the main energy change that takes place as a ball rolls down a hill? 30 1.Kinetic to Potential 2.Potential to heat 3.Kinetic to sound 4.Potential to kinetic

A stunt car drives off a cliff at a speed of 10m/s. The mass of the car is 1500kg and the cliff is 15m high. What is the kinetic energy as it hits the ground ? x 10 3 J x 10 4 J x 10 5 J x 10 5 J

A 55kg boy on a 20kg bike moves at 6m/s when she brakes and comes to rest in 3s. What is the power of the brakes? 1.225J J J 90