1.0.1 Mechanics Mc

8/7/2019 1.0.1 Mechanics Mc

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Past Paper questions

1991 - 2001


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96. A woman walks 12 km due North. She thenturns round immediately and walks 4 kmdue South. The total journey takes

4 hours.

Which row in the following table gives thecorrect values for her average velocity andaverage speed?

97. The following, velocity-time graph describesthe motion of a ball, dropped from rest and

bouncing several times.

Which of the following statements is/are true?

I The ball hits the ground at P.

II The ball is moving upwards between Qand R.

III The ball is moving upwards between Rand S.

A I onlyB II onlyC III onlyD I and II onlyE I and III only

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98. The momentum of a rock of mass 4 kg is

12 kgms-1

The kinetic energy of the rock is

A 6 JB 18 JC 36 JD 144 JE 288 J.

99. Density is measured in

A N m-2

B N m-3

C kgm3

D kgm-2E kgm-3

100. The pressure of a fixed mass of gas is100 kPa at a temperature of -52C.

The volume of the gas remains constant.

At what temperature would the pressure ofthe gas be 200 kPa?

A -26 CB +52C

C +147C

D +169C

E +442C

101. The end of a bicycle pump is scaled witha stopper so that the air in the chamber istrapped.

The plunger is now pushed in slowlycausing the air in the chamber to be

compressed. As a result of this thepressure of the trapped air increases.

Assuming that the temperature remains

constant, which of the following explain/swhy the pressure increases?

I The air molecules increase theiraverage speed.

II The air molecules are colliding moreoften with the walls of the chamber.

Ill Each air molecule is striking the wallsof the chamber with greater force.

A II only

B III onlyC I and II onlyD I and Ill onlyE I, II and III


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102. A speed skier crosses the start-line of astraight 200 metre downhill course with a

speed of 30 ms-1. She acceleratesuniformly all the way down and takes 5 s to

cover the course.What is her speed as she crosses thefinish-line?

A 30 m s-1

B 35 m s-1

C 40 m s-1

D 45 m s-1

E 50 m s-1

103. For the purpose of a car advertisingcampaign, a car with a dummy driver isdriven over a cliff, as shown.

The car leaves the top of the cliff

horizontally at a speed of 25 m s-1 and hitsthe ground below 3 s later.

Assuming that air resistance is negligibleand that the acceleration due to gravity is

10 ms-2, what is the height of the cliff?

A 30 mB 45 mC 75 mD 90 mE 120 m

104. The following velocity-time graphrepresents the vertical motion of a ball.


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105. While being towed behind a speedboat,John and his paraglider are movinghorizontally with a constant velocity, asshown below.

The towing cable exerts a force of 5000 Non John and his paraglider. What is thehorizontal resistive force acting on Johnand his paraglider?

A 2500 NB 4330 NC 5774 ND 7500 NE 10000 N

106. The diagram below shows the masses andvelocities of two trolleys just before theycollide on a level bench.

After the collision, the two trolleys movealong the bench joined together.

How much kinetic energy is lost as a resultof this collision?

A 0 JB 6 JC 12 JD 18 JE 24 J

107. A golfer hits a golf ball with a club. Thegraph below shows how the force between

the club and the ball varies during the timeof contact.

The area under the curve on the graph is

equal to

A the distance travelled by the ballB the average force on the ballC the change in the speed of the ballD the change in the momentum of theballE the acceleration of the ball.

108. Water flows over a waterfall, which is

120 m high, at a rate of 1 x 106 kg s-1.

Assuming that the acceleration due togravity is 10 m s-2, which of the followinggives the power delivered by the water infalling?

A 1200 x 106 W

B 120 x 106 W

C 12 x 106 W

D (1x106)/120 W

E (1x106)/1200 W


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116. Which of the following gives thecorrect relationship between thepressure and temperature of a fixedmass of an ideal gas at constantvolume?

A The pressure is directlyproportional to the temperaturein C.

B The pressure is inverselyproportional to the temperaturein C.

C The pressure is directlyproportional to the temperaturein K.

D The pressure is inverselyproportional to the temperaturein K.

E The expression (pressure Xtemperature in K) is constant.

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1.0.1 Mechanics Mc

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