Mechanics Random Retrieval

This quiz contains all the questions in the Mechanics section. The website will pick 10 questions at random.

1 / 10

A window cleaner leans her ladder against a vertical wall in order to start work. The ladder has a length of 6 m and mass of 15 kg, she places it at an angle of 50°. Calculate the reaction force from the wall at W. g=9.81 ms_-2

8.9 N

61.7 N

87.7 N

123.5 N

2 / 10

The diagram shows Harry and Dudley on a see-saw. Harry is sat 120 cm away from the pivot. How far away from the pivot must Dudley sit to balance with Harry?

46 cm

55 cm

46 m

55 m

3 / 10

The diagram shows a swing 1.43m long. Matilda has a mass of 35 kg and is released from rest at position A by Miss Honey. Calculate the speed of Matilda at position B.

1.94 ms^-1

3.75 ms^-1

6.5 ms^-1

14.1 ms^-1

4 / 10

Momentum is a scalar quantity.

TRUE

FALSE

5 / 10

This graph shows the velocity of a skydiver during a jump. Select the sentence which best describes his motion.

The skydiver jumps from the plane and accelerates to their terminal velocity. They then deploy a smaller parachute to slow them down, before deploying their larger parachute and landing.

The skydiver jumps from the plane and accelerates to their terminal velocity. They change their body shape to a less aerodynamic shape, increasing their drag before reverting to their original position. They then deploy their parachute and land.

The skydiver jumps from the plane and accelerates to their terminal velocity. They change their body shape to a less aerodynamic shape (X), increasing their drag before reverting to their original position. They change their body shape back to X before landing.

The skydiver jumps from the plane and accelerates to their terminal velocity. They change their body shape to a less aerodynamic shape (X), but get caught in a gust of wind which pushes them back up into the sky. Then they deploy their parachute before landing.

6 / 10

Samantha Cristoforetti is an Italian astronaut. We can't find her mass online, so let's assume 60 kg. Where does she weigh the most at?

Venus

Earth

International Space Station (ISS)

Mars

7 / 10

Select the missing phrase. "A joiner uses a hammer to hit a nail into wood. When the hammer strikes the nail, _____________

the nail exerts an equal force back on the hammer and doesn't move.

the nail exerts an equal force back on the hammer and moves into the wood.

the nail exerts a force proportional to its size back on the hammer and doesn't move.

the nail exerts a force proportional to its size back on the hammer and moves into the wood.

8 / 10

Select the best statement for Newton's 1st Law:

An object will remain at rest unless acted on by a resultant force.

An object will remain at rest or at a constant velocity unless acted on by a resultant force.

The rate of change in momentum of a body is directly proportional to the resultant force applied.

When two objects interact they will exert equal and opposite forces on each other.

9 / 10

Select the graph which best fits the motion of a pogo stick being bounced on at regular intervals.

A

B

C

D

10 / 10

Marvin the Martian fires his gun horizontally at Bugs Bunny at a height of 60 cm. It fires at 550 ms^-1, but misses. Calculate how far away from Marvin the shot lands. g_Mars = 3.71 ms^-2

67.3 m

177.9 m

192.4 m

312.8 m

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