Paper 1(XMSS 2021 Prelims)

Quiz by Jessica Lew

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Q 1/40
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A ticker tape timer is used to monitor the motion of a toy cart. The frequency of the tickertape timer is 20 Hz. A section of the paper tape pulled by the cart is shown. What is the average speed of the cart shown by the tape between X and Y?
29
37 cm s^-1
23 cm s^-1
46 cm s^-1
50 cm s^-1

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40 questions

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Q1
A ticker tape timer is used to monitor the motion of a toy cart. The frequency of the tickertape timer is 20 Hz. A section of the paper tape pulled by the cart is shown. What is the average speed of the cart shown by the tape between X and Y?
37 cm s^-1
23 cm s^-1
46 cm s^-1
50 cm s^-1
120s
Q2
Which row describes the motion of cars X, Y and Z correctly?
120s
Q3
An object falls from rest through air until it reaches terminal velocity. What can be said about the acceleration of the object during the fall?
zero acceleration
decreases from 10 m s^-2to zero
increases from zero to 10 m s^-2
constant at 10 m s^-2
120s
Q4
The diagram shows a metal ball of weight W, being suspended by a string from point P. The ball is held stationary to one side by a horizontal force F. The tension in the string is T. Which vector diagram correctly represents the three forces W, F and T acting on the ball?
120s
Q5
A woman stands in a lift that is accelerating upwards at 0.75 m s^-2. She has a mass of 52 kg.
What is the normal reaction force exerted on her by the floor during the motion?
520 N
390 N
481 N
559 N
120s
Q6
Which statement is correct?
Mass and weight formatter can both be zero.
Gravitational field strength is the gravitational force acting per unit mass
Gravitational field is a region in which a mass experiences a force due to gravitational attraction or repulsion.
1 kg of iron is heavier than 1 kg of air.
120s
Q7
A wooden block of dimension 1.0 m by 1.0 m by 1.0 m has a mass of 800 kg. If a boy saws half the block away, what is the density of the remaining wooden block?
1600 kg m^-3
1200 kg m^-3
800 kg m^-3
400 kg m^-3
120s
Q8
The diagram shows a balancing toy pivoted on a stand. If the toy is tilted slightly, it does not topple but returns to its original position. This is because the centre of gravity of the toy is_____
inside the weight.
between the weight and pivot.
below the pivot.
exactly at the pivot.
120s
Q9
The diagram shows a uniform bar in equilibrium. What is the magnitude of the force F?
32 N
8.0 N
64 N
16 N
120s
Q10
A manometer contains water and a liquid X. The two liquids do not mix with each other. The pressure at level P is the same for the two liquids. The density of water is 1000 kg m^-3. What is the density of liquid X?
600 kg m^-3
730 kg m^-3
50 kg m^-3
1700 kg m^-3
120s
Q11
The system shown in the diagram contains an incompressible liquid. A downward force of 3.0 N is exerted on piston L. What is the upward force on piston K?
240 N
0.15 N
60 N
27 N
120s
Q12
Four persons climbed up four different staircases. Their weights, vertical heights of the staircases and times are recorded in the table below. Which person develops the least power?
120s
Q13
A rocket of total mass M is travelling at a speed v. The engine of the rocket is fired and fuel is used up. The mass of the rocket decreases to M/2 and its speed increases to 2v. What happens to the kinetic energy of the rocket?
The kinetic energy doubles.
The kinetic energy increases by a factor of four
The kinetic energy remains the same.
The kinetic energy halves.
120s
Q14
The diagram shows a light source illuminating smoke particles in air. When observed with a microscope, moving points of light are seen. What are these moving points of light?
Reflected light from air molecules, colliding with smoke particles.
Reflected light from smoke particles, colliding with air molecules.
Reflected light from smoke particles that move due to convection.
Reflected light from smoke and air particles that move randomly.
120s
Q15
A silver spoon and a plastic spoon are placed on a table in a room. Which statement explains that the silver spoon is colder to the touch than the plastic spoon?
Silver spoon is a better radiator of heat radiation than plastic spoon.
Silver spoon is a better reflector of heat radiation than plastic spoon.
Silver spoon is a better absorber of heat radiation than plastic spoon.
Silver spoon is a better conductor of heat than plastic spoon.
120s