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WorksheetsYear 9 Physics Review
Total questions: 40
Worksheet time: 26mins
What name is given to the energy stored when an object is lifted above the Earth’s surface?
chemical potential energy
elastic potential energy
gravitational potential energy
kinetic energy
What is the equation used to calculate power?
power = energy transferresd/time
power = energy transferred × time
power = speed × time
power = 0.5 × energy transferred × (time)2
What is efficiency?
useful energy transferred by a device plus the total energy supplied to the device
useful energy transferred by a device minus the total energy supplied to the device
useful energy transferred by a device divided by the total energy supplied to the device
useful energy transferred by a device multiplied by the total energy supplied to the device
A football has a mass of 0.4kg and travels at a speed of 30.5m/s. What is the kinetic energy stored in the football?
6.1J
12.2J
186.05J
372.1J
A spring with a spring constant of 20N/m is extended by 0.2m. How much elastic potential energy is stored in the spring? Use the equation Ee = 1 2 k e2 .
0.4J
0.8J
1.6J
2.0J
A motor is supplied with 2000J of energy. 1850J of energy is usefully transferred. What is the percentage efficiency of the motor?
0.925%
9.25%
92.5%
925%
50 000J of water is used to heat 2kg of water. Specific heat capacity of water = 4200J/kg °C. What is the temperature change of the water? Use the equation ΔE = m c Δθ.
2.98°C
5.95°C
11.90°C
23.81°C
Which of the following is not one of the three states of matter?
solid
liquid
semi-permeable plasma
gas
What is caused by the particles in a gas colliding with the walls of a container?
an increase in mass
pressure on the walls of the container
an increase in density
a change of state
What is the equation used to calculate density?
density = mass × volume
density = mass/volume
density = volume/mass
density = mass × volume2
What is the unit for density?
kilograms (kg)
newtons (N)
metres cubed (m3)
kilograms per metre cubed (kg/m3)
In which state of matter are the particles able to move around most freely?
solid
liquid
gas
plasma
The volume of an object is decreased while its mass is kept constant. How does this affect the density of the object?
the density increases
the density decreases
there is no change
it depends on the material of the object
Which of the following statements about changes of state is correct?
mass is conserved during a change of state
mass is lost during a change of state
mass can be either lost or gained depending on the change of state
mass is gained during a change of state
What type of change is a change of state?
physical change
chemical change
emotional change
it depends on the change of state
An object has a mass of 800kg and a density of 1600kg/m3. What is the volume of the object?
2m3
0.5m3
2cm3
0.5cm3
How much energy is required to increase the temperature of 10kg of water by 50oC? The specific heat capacity of water is 4200J/kg oC. Use the equation change in thermal energy = mass × specific heat capacity × temperature change.
2100J
2.1kJ
2.1MJ
21 000J
What is a force?
a push or a pull that acts on an object due to the interaction with another objectinteraction between objects that are physically separated
the interaction between objects that are physically separated
the interaction between objects that are touching
the movement of an object due to gravity
Scalar quantities have magnitude but no direction. Which of the following is a scalar quantity?
acceleration
force
speed
velocity
Which of the following is an example of a non-contact force?
air resistance
magnetic force
tension
upthrust
A person has a mass of 50kg. What is their weight on Earth?
The gravitational field strength on Earth is 9.8N/kg.
5.1N
40.2N
50N
490N
What is the equation that links distance, force and work done?
work done = force × distance
work done =
force/distance
force = work done × distance
force =
distance/work done
Which statement best describes the motion of the object represented by the graph?
the object is accelerating
the object is decelerating
the object is moving at a constant speed
the object is stationary
Why is a car more likely to skid when travelling on an icy road compared to travelling on a dry road?
the car is travelling at a greater speed
the driver is more distracted
there is less friction between the road and the tyres
there is more air resistance acting on the car
An object accelerates from 5m/s to 25m/s in 5 seconds.What is the acceleration of the object?
4m/s2
5m/s2
6m/s2
35m/s2
According to Newton’s First Law, what will happen to a stationary object if the resultant force
on it is zero?
it will change speed
it will change direction
it will remain stationary
none of the above
A resultant force of 1250N causes a vehicle to accelerate at 2.5m/s2.
What is the mass of the vehicle?
500kg
2000kg
3125kg
5000kg
What is the specific heat capacity?
the amount of energy required to raise the temperature of 10kg of a substance by 10°C
the amount of energy required to raise the temperature of 1kg of a substance by 10°C
the amount of energy required to raise the temperature of 1kg of a substance by 1°C
the amount of energy required to raise the temperature of 10kg of a substance by 1°C
How much energy is requiredtoincreasethetemperatureofa10kgblockofironfrom 15oC to 25oC?
The specific heat capacity of iron is 0.44J/kg °C. Use the equation
change in thermal energy = mass × specific heat capacity × temperature change.
440J
4.4J
44J
0.44J
Which of the following changes of state does latent heat of fusion apply to?
solid to liquid
solid to gas
gas to liquid
gas to solid
The energy for a change of state can be calculated using the equation E = m × L. What is the correct rearrangement to calculate the mass of the substance?
m = E × L
m = E ÷ L
m = L ÷ E
m = L + E
What is the unit for specific heat capacity?
joules (J)
kilograms (kg)
degrees Celsius (oC)
joules per kilogram per degree Celsius (J/kg oC)
Which of the following changes of state does latent heat of vaporisation apply to?
solid to liquid
liquid to gas
gas to solid
liquid to solid
How much energy is required to change 50g of ice into liquid water? The specific latent heat of fusion of water is 334kJ/kg.
Use the equation energy for a change of state = mass × specific latent heat.
16 700J
16.7J
6.68kJ
149J
What is inertia?
a measure of how difficult it is to change the velocity of an object
the force required to overcome friction
the force required to make an object move
the tendency of objects to continue in their state of rest or state of uniform motion
motorcycle accelerates from 20m/s to 30m/s with an acceleration of 2m/s2.
What is the distance travelled by the motorcycle? Use the equation v2 - u2 = 2as.
75m
125m
225m
500m
What is the equation that links mass, momentum and velocity?
mass = momentum × velocity
mass =
velocity/momentum
momentum = mass × velocity
momentum =
mass/velocity
What name is given to the turning effect of a force?
gear
lever
moment
pivot
What is the equation that links distance, force and moment of a force?
force =
distance/moment
force = distance × moment
moment =
force/distance
moment = force × distance
Gear A is turned by gear B. Gear A has a radius of 0.2m and gear B has a radius of 0.1m.
The moment of gear B is 24Nm. What is the moment of the gear A?
12Nm
24Nm
48Nm
96Nm
