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WorksheetsChapter 2 Forces & Motion
Total questions: 50
Worksheet time: 52mins
Forces on an object that are equal in size & opposite direction, cancelling each other out, are called . . .
unbalanced forces
balanced force
friction
gravity
A force that opposes motion; can act between two objects that are touching, or between air & a moving object . . .
gravity
friction
balanced forces
unbalanced forces
When an object is ....
To calculate forces that are in opposite directions you...
add them
subtract them
multiply them
divide them
To calculate forces that are in the same direction you..
subtract them
add them
multiply them
divide them
Forces that are considered to be in motion are called...
friction
unbalanced forces
balanced forces
Inertia is...
an objects ability to change direction
an objects ability to move
forces depend on the mass and weight of the object
an objects tendency to resist change in motion
Why does a newly oiled machine work faster than a machine that hasn't been oiled?
Oil reduces the friction between the parts
Oil increases the friction between the parts
Gravity acts more on an old machine
Gravity acts more on a new machine
Below is the conversation between Ina and Ayu using "text messaging" application.
Ayu states that she will arrive at Ipoh earlier if she starts travelling at the same time and same place as Ina.
Based on the above conversation, what are the momentum of the car and the Electric Train Service, ETS?
Diagram 2 shows a golfer hitting a golf ball.
Impulsive force is produced when
the golf club is swung at high velocity
the golf club is swung backward
the golf club hits the golf ball
the golf ball moves in the air
Diagram 3 shows a tennis ball of mass 0.058 kg hitting a concrete wall with a velocity 50ms-1. The ball bounces back with a velocity of 45ms-1.
What is the impulse acting on the ball?
-5.51 kg ms-1
-0.29 kg ms-1
0.29 kg ms-1
5.51 kg ms-1
Diagram 4 shows a PVC vacuum tube is erected vertically. Three identical spheres made off cork, c, rubber, r and steel, s are dropped through the tube.
The time, l, taken to reach the base of the tube is recorded as /s, t and t. respectively.
Which comparison is correct?
ts > tr > tc
tc> tr > ts
tr > ts > tc
tr = tc = ts
Diagram 5 shows a man is moving from X to Y.
What is the energy transformation experienced by the man?
Kinetic energy → Gravitational potential energy → Chemical energy
Chemical energy → Gravitational potential energy →Kinetic energy
Chemical energy → Kinetic energy → Gravitational potential energy
Gravitational potential energy → Chemical energy → Kinetic energy
Which statement explains the importance to maximize the efficiency of a device?
Reduces energy waste
Increases the life span of a device
Increases the resistance of a device
Reduces the corrosion of a device
Diagram 6 shows three springs, F, G and H, made of same material and diameter of wire.
A 500 g mass is then hung to each spring. The extension, X, of each spring is measured as XF XG and XH, respectively.
Which comparison is correct?
XF > XH> XG
XH > XF >XG
XG > XF > XH
XF = XH = XG
Diagram 3 shows a cat chasing a rat.
The inertia o fthe cat is bigger than the rat because
the size of the cat is bigger than the rat
the mass of the cat is bigger than the rat
the length of the cat is more than the rat
the height of the cat is more than the rat
Which diagram shows the unbalanced forces acting on an object?
Diagram 4 shows a martial art student breaking a pile of bricks.
What is the physics concept that make the brick break?
Impulsive force
Momentum
Pressure
Impulse
Diagram 5 shows a stone is thrown vertically upwards at a velocity of 20 m s-1.
What is the maximum height achieved by the stone?
2 m
19 m
20 m
40 m
The force, F, applied to a spring is directly proportional to the spring's extension or compression, x.
The above statement is
Snell's Law
Hooke's Law
Charles' Law
Newton's Third Law of motion
Diagram 4 shows a balloon with air rushing out from the nozzle of the balloon.
This situation is explained by
inertia
impulse
impulsive force
Newton's third law
Diagram 5 shows a tractor on a muddy ground.
Why does the tractor has big and wide tyres?
To reduce the pressure on the ground
To support the weight of the tractor
To produce a strong grip on the ground
To avoid the tractor from skidding
Diagram 6 shows three identical springs with the original length of 16.0 cm.
What is the length of Y?
2.0 cm
6.0 cm
l0.0cm
13.0cm
Diagram 3 shows displacement-time graph of a moving object.
Which velocity, v against time,t graph describe the motion of the object?
Diagram 4 shows Jamal drives a bike at a constant speed of 25 ms-1. The two forces resisting motion are air friction of 30 N and frictional force of 80 N.
Determine the thrust force of the engine.
50 N
55 N
85 N
110 N
Diagram 5 shows a boy bending his leg upon landing.
Why does the boy bend his leg?
To lengthen the time of falling to the ground
To shorten the time of falling to the ground
To lengthen the time of impact of his feet with the ground
o shorten the time of impact of his feet with the ground
Three forces 3N, 4N and 5N acting on an object.
Which diagram shows correctly when the object is in equillibrium state?
Diagram 6 shows the force, F against extension, x graph of a spring.
Calculate the elastic potential energy stored in the spring when the extension is 3 cm.
0.45 J
45 J
80 J
90 J
Diagram 5 shows a car moves with constant velocity.
The forces are balanced when
net force is zero
net force is equal
net force is equal to frictional force
net force is less than frictional force
An object moves with a velocity is acted by a constant force. Which graph shows the correct relationship between velocity and time?
Diagram 1 shows the arrangement of two identical spheres, P and Q using two identical threads
X and Y.
What happens when sphere Q is snatched down quickly?
Thread X snaps
Both thread snap
Thread Y snaps
Both threads do not snap
Diagram 2 shows a particle of mass m moves with a constant speed, v, around a circle.
What is the change in momentum of the particle when it moves from P to Q?
0
1/2mv
mv
2mv
Three forces act on a point O. Which diagram shows that the forces are in equilibrium?
Diagram 4 shows a stone fall from a height of H. Which physical quantity decreases?
Gravitational potential energy
Kinetic energy
Momentum
Acceleration
Diagram 5 shows a graph of force, F, against extension of spring, x of a stretched spring. What
is the elastic potential energy of the spring?
1.25 J
2.5 J
125 J
250 J
Diagram shows a boy pulling a block on a rough surface with force F.
Which diagram shows the actions of forces on the block?
Diagram shows a student with mass 70 kg climbing stairs at a height of 4 m in 40 s.
How much power is generated by the student?
28 W
35 W
70 W
700 W
Diagram shows ball bearing P being released on a smooth plane.
What is its velocity at Q?
2.4 m s–1
4.0 m s–1
7.8 m s–1
16.0 m s–1
Diagram shows a stone on top of a smooth slope.
The stone slides down the slope and stops at point P.
What is the work done by the stone?
14 J
18 J
140 J
180 J
Diagram shows a velocity-time graph for a motion of a toy car.
What is the displacement of the car in 6 s?
0 m
30 m
45 m
75 m
