Mechanics Random Retrieval

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

1 / 10

A uniform plank GD has mass 13 kg and length 1.8 m. A mass 6.8 kg is attached to the plank at D. The plank remains balanced due two ropes attached The tension in the rope at G is half the tension of the the rope at A, calculate the tension in the rope at A. g = 9.81 ms^-2

59 N

130 N

234 N

469 N

2 / 10

Select the SI unit for Power.

Js^-1

m kg s^-1

m²kg s^-2

m²kg s^-3

3 / 10

An Airbus A380 at maximum take-off weight, A_max = 575,000 kg, is taxing along at 37 km h^-1. The pilot isn't paying attention and accidently hits head on another A380 that is completely empty taxing at 40 km h^-1, A_min = 277,145 kg and they rebound off each other in opposite directions. If the collision reduces the speed of A_max to 6 ms^-1 then what speed is A_min now travelling at?

4 ms^-1

6 ms^-1

10 ms^-1

20 ms^-1

4 / 10

Shoaib Akhtar is the fastest bowler ever. He throws a cricket ball of 163 g at a speed of 161.3km h^-1 which strikes a stationary cricket bat. Calculate the momentum of the ball before the collision.

7.3 kg ms^-1

26.3 kg ms^-1

1.6x10⁴ kg ms^-1

7.3x10⁴ kg ms^-1

5 / 10

Sheffield is famous for its snooker. A 170 g white ball is struck with a cue and travels along the snooker table at 12 ms^-1. Calculate it's momentum.

2.04 kg ms^-1

204 kg ms^-1

2040 kg ms^-1

6 / 10

Why do objects (in a medium) not achieve terminal velocity instantly?

The upward force is larger than the downward force so there is a resultant force upward.

The opposing force needs time to build up and oppose.

The acting forces need time to balance.

The downward force is larger than the upward force so there is a resultant force downward.

7 / 10

Select one way to increase the terminal velocity of an object.

Increase the frictional force.

Increase the driving force.

Decrease the driving force.

Increase the mass of the object.

8 / 10

Mount Teide in Tenerife is a dormant volcano and has a peak of 3,718 m, making it the highest point in Spain. If thrown(!) at an angle of 40°, with a velocity of 1.94x10⁴ ms^-1 will a piece of pumice land in Tarfaya (Arabic: طرفاية), Morocco 367 km away? Assume no obstacles and no air resistance. g_Earth = 9.81 ms^-2

Yes, exactly.

Yes, ± 500 m.

No, it will fall short by more than 500 m.

No, it will overshoot by more than 500 m.

9 / 10

An ill prepared student asks for a pen to write with in class, and the teacher grudgingly lends one out. Instead of walking over to the student, the teacher decides to throw them the pen. The teacher throws the pen at angle of 14° and a speed of 23 ms^-1. Sadly, the teacher misses and the pen continues on it's projected path out the window and takes 5 seconds to hit the car park outside.

Calculate the height different between the point of release and the car park floor. g_Earth = 9.81 ms^-2

95 m

96 m

112 m

123 m

10 / 10

Select if the following is a scalar or a vector: displacement

Scalar

Vector

Your score is

0%

Recent Posts

Categories