WorksheetsPHY F4 FORCES & MOTION (II)
Total questions: 13
Worksheet time: 13mins
Diagram 8 shows two identical plasticine balls, P and Q, dropped from the same height onto two different objects. Which of the following is the same for both P and Q?
Impulsive force
Impulse
Time of impact
Deceleration
Diagram 9 shows the variation of force with time of Impact when a tennis ball hits a wall. What is the total impulse experienced by the tennis ball due to this impact?
2 Ns
4 Ns
20 Ns
100 Ns
Which feature can improve the safety of passengers in a car?
Power steering
Sport rims
Metallic paint
Air bag
Braking gradually is safer than braking suddenly because
the passengers are likely to be thrown forward
there will be less wear and tear to the tyres when braking gradually
the impulsive force on the passengers will be lesser when braking gradually.
the car will stop in a shorter distance when braking gradually.
Gravitational acceleration on the Moon's surface is less than on the Earth's surface. As a result,
objects fall with greater speed on the Moon's surface.
objects have smaller mass on the Moon's surface.
objects have smaller weight on the Moon's surface.
objects have smaller density on the Moon's surface.
The mass of an object is 200 g. If it falls freely to the ground with an acceleration of 10 ms-2, what is its weight?
2000 N
200N
20N
2N
Diagram 10 shows an aeroplane flying with a constant velocity at a constant height. Which pair of forces must have the same magnitude?
F1 and F3
F3 and F2
F4 and F3
F1 and F4
Diagram 11 shows a man pulling a trolley with a rope. What is the magnitude of the horizontal force when the trolley is pulled?
16.7 N
150 N
250 N
433 N
A trolley is pushed with a force along a horizontal path through a distance. The variation of force with distance moved is shown in Diagram 12. The total work done by the force in moving the trolley by 14 m is
112 J
96 J
80 J
64 J
A stone is thrown vertically upwards from the ground. It reaches a maximum height of h and returns to the ground. Diagram 13 shows the motion of the stone. At which position, Q, R, S or T, the kinetic energy is the same with the potential energy?
Q
R
S
T
Which of the following can maximise the energy usage in refrigerator?
The refrigerator must have the freezer at the top of the compartment.
The refrigerator must be placed closely against the wall.
Leave the door of the refrigerator opens as long as possible.
Do not remove the ice formed on the wall of the freezer.
An elastic material
returns to its original shape but not its original size after the deforming force is removed.
returns to its original size but not its original shape after the deforming force is removed.
returns to its original shape and size after the deforming force is removed.
Diagram 14 shows a spring in three conditions. Assume that the spring obey Hooke's law, what is the value of x?
4
8
9
12
