HL Physics End of Year review

What is the order of magnitude of the wavelength of visible light?

Which quantity has the same units as those for energy stored per unit volume?

• Density

• Force

• Momentum

• Pressure

At high pressures, a real gas does not behave

as an ideal gas. For a certain range of pressures,

it is suggested that for one mole of a real gas at

constant temperature the relation between the

pressure p and volume V is given by the equation

pV = A + Bp where A and B are constants.

Use the graph to determine the trend line.

A body is held in translational equilibrium by three coplanar forces of magnitude 3 N, 4 N and 5 N.

Which statement is true?

• Two of the forces are perpendicular to each other

• The vector sum of the forces is equal to zero

• The sum of the x-components of the forces is equal to the sum of the y-components

• The net force is 12 N

An object of mass 1 kg is thrown downwards from a height of 20 m. The initial speed of the object is 6 m s^–1.

The object hits the ground at a speed of 20 m s^–1. Assume g = 10 m s^–2. What is the best estimate of the energy transferred from the object to the air as it falls?

• 6 J

• 18 J

• 182 J

• 200 J

A car is driven from rest along a straight horizontal road. The car engine exerts a constant driving force. Friction and air resistance are negligible. How does the power developed by the engine change with the distance travelled?

• Power does not change.

• Power decreases linearly.

• Power increases linearly.

• Power increases non-linearly.

An object of mass 8.0 kg is falling vertically through the air. The drag force acting on the object is 60 N. What is the best estimate of the acceleration of the object?

An object of mass 2m moving at velocity 3v collides with a stationary object of mass 4m. The objects stick together after the collision. What is the final speed and the change in total kinetic energy immediately after the collision?

• A

• B

• C

• D

What is not an assumption of the kinetic model of an ideal gas?

• Attractive forces between molecules are negligible.

• Collision duration is negligible compared with time between collisions.

• Molecules suffer negligible momentum change during wall collisions.

• Molecular volume is negligible compared with gas volume.