Physics Worksheet - Volume and Free Fall

A measuring cylinder contains some water. A small metal block is slowly lowered into the water and is then removed. Finally a piece of plastic is attached to the metal block and the block is again slowly lowered into the water. The diagrams show the measuring cylinder at each stage of this process.

• A 10 cm³

• B 25 cm³

• C 70 cm³

• D 80 cm³

The diagram shows the vertical forces acting on a ball as it falls vertically through the air. The ball does not reach terminal velocity. Which row describes what happens to the resultant force on the ball and what happens to the acceleration of the ball as it falls through the air?

• decreases, decreases

• decreases, increases

• increases, decreases

• increases, increases

On the Moon, all objects fall with the same acceleration. Which statement explains this?

• On the Moon, all objects have the same weight.

• The Moon has a smaller gravitational field strength than the Earth.

• The weight of an object is directly proportional to its mass.

• The weight of an object is inversely proportional to its mass.

The lamp in the diagram is not very stable and falls over easily. Which row shows changes that would definitely make the lamp more stable?

• A narrower higher

• B narrower lower

• C wider higher

• D wider lower

The diagram shows an incomplete scale drawing to find the resultant of two 10 N forces acting at a point in the directions shown. What is the magnitude of the resultant force?

• 7.5 N

• 8.6 N

• 18 N

• 20 N

An object has a mass of 60 kg. It decelerates from 50 m/s to 20 m/s when a resultant force of 300 N acts on it. For how long does the force act?

• 0.071 s

• 0.17 s

• 6.0 s

• 14 s

A man stands next to a railway track. A train travelling at 40 m/s takes 2.0 s to pass the man. What is the length of the train?

• A 20 m

• B 38 m

• C 40 m

• D 80 m

Which statement is correct when the skydiver has reached terminal velocity?

• The skydiver’s speed is decreasing.

• The skydiver’s speed is increasing.

• The skydiver is moving with constant speed.

• The skydiver’s speed is zero.

On the Moon, all objects fall with the same acceleration. Which statement explains this?

• On the Moon, all objects have the same weight.

• The Moon has a smaller gravitational field strength than the Earth.

• The weight of an object is directly proportional to its mass.

• The weight of an object is inversely proportional to its mass.

A measuring cylinder contains 30 cm³ of a liquid. Some more of the liquid is added until the liquid level reaches the 50 cm³ mark. The reading on the balance increases by 30 g. What is the density of the liquid?

• 0.60 g/cm³

• 0.67 g/cm³

• 1.5 g/cm³

• 1.7 g/cm³