WorksheetsPHYSICS 2ND TERM EXAMINATION 2022/2023
Total questions: 50
Worksheet time: 1hrs 13mins
A force of 20N pushes an object of mass 5.0kg along a rough horizontal surface where the frictional force is 5.0N.
What is the acceleration of the object?
1.0 m/s 2
2.0 m/s 2
3.0 m/s 2
4.0 m/s 2
A student produces some revision notes on gravity, mass and weight. Which statement is not correct?
A gravitational field is a region in which a mass experiences a gravitational force.
Gravitational field strength has the unit N/kg
Mass is a measure of the amount of matter
Mass is equal to weight multiplied by gravitational field strength
The input power to a motor is 300 W. In 20s it lifts a load of 400N through a height of 6.0m.
What is the efficiency of the motor?
20%
25%
40%
' 75%
Which is correct? -
Workdone=force x speed
Work-done = force x distance moved
Workdone= speed x distance moved
Which is the incorrect relation statement?
Density = mass/volume
Weight = mass x gravitational field strength
Speed = displacement /time
Velocity = displacement /time
Using the following mathematical relations that represent two physical quantities:
Quantity (A)= 1 /2 Xmass X velocity squared k.E=1/2mv2 Quantity (B)=Force x Displacement. (W = F. d) So that, the dimensional formula (ML2 T -2 ) represents :
Quantity (A) only
Quantity (B) only
Both (A & B )
Neither (A) nor (B)
A horse tries to pull a wagon loaded with wood. If the pull force of the horse represents an "action", which force of the following represents the "reaction"?
A The friction force between the wagon wheels and the ground.
The pull force of the wagon to the horse.
The air resistance to the wagon.
The friction force between the horse legs and the ground
Using the following relations:
(Force = mass x acceleration)
(Potential Energy = mass x acceleration x height) So, the relation between The Newton (the measuring unit of force)and The Joule( the measuring unit of potential energy) is
Newton = Joule/meter
Newton = Joule. Meter
Newton = meter/ Joule.
Newton = Joule.
If the length of a rectangle = |5 ± 0.1 | m and
its width = |4 ± 0.2 | m. So, the rectangle area is :
| 9 ± 0.3 | m2
|20 ± 0.3| m2
|20 ± 1.4 | m2
|20 ± 0.5 | m2
It's an example of vector quantity
Distance
Displacement
Energy
Mass
Which one of these options is NOT a vector quantity
Force
Displacement
Momentum
Energy
A 5 kg ball is lifted 12 m above the ground. The ball:
gains elastic potential energy
gains gravitational potential energy
gains kinetic energy
gains mechanical energy
Which of the following objects has the most kinetic energy?
A 20 kg toddler running at 5 m/s
A 50 kg toddler running at 30 m/s
A 90 kg toddler running at 30 m/s
A 100 kg toddler running at 5 m/s
Which of the following is true for a system consisting of a mass oscillating on the end of an ideal spring?
The kinetic and potential energies are equal to each other at all times.
The kinetic and potential energies are both constant.
The maximum kinetic energy and maximum potential energy are equal, but occur at different times.
The maximum potential energy is achieved when the mass passes through its equilibrium position.
M L -1 T -2 is the dimensional formula of .......
acceleration
force
work
pressure
mole is the unit of ....
temperature
quantity of material
plane angle
luminous intensity
600 inches due east is an example of ---
Displacement
Speed
Acceleration
Distance
20km due east is an example of ---
Scalar quantity
Vector quantity
Fundamental quantity
Basic quantity
500 miles is an example of …...
Displacement
Distance
Force
Speed
The following are examples of scalar quantities, Except ---
Time
Temperature
Velocity
Mass
One of the following is a vector quantity.
Force
Distance
Mass
Speed
power is defined as the
capacity to exert a force
product of force and time
product of force and distance
energy expended per unit time.
What is the unit equivalent of joules?
Nm
Nm2
kgm/s
kgm/s²
What is the unit equivalent of watt?
Nm/s
Nm
kg/m
kg/m
Which of the following sources has the same unit as energy?
Power
Work
Force
Momentum.
Which of the following sources of energy is renewable?
sun
Petroleum
Coal
Uranium
Which of the following statements correctly defines quantitatively, the work done by a force? The product of the force and the distance moved
parallel to the line of action of the force from a reference point
perpendicular to the line of action of the force from a reference point
on a line through the reference point
by the object
The mass on a loaded spiral spring oscillates vertically between two extreme positions P and R equidistant from the equilibrium position Q. Which of the following statements about the system is not correct?
The momentum of the mass is maximum at Q
The elastic potential energy of the spring is maximum at Q
The kinetic energy of the mass is maximum at P
The total energy of the system is always constant
A stone of mass 0.5kg is dropped from a height of 12m. Calculate its maximum kinetic energy. ( g = 10m/s2)
3.0J
6.0J
30.0J
60.0J
A 70 kg man ascends a flight of stairs of height 4m in 7s. The power expended by the man is
40W
100W
280W
400W
A pump lifts water into an overhead tank at a height of 12m at the rate of 5kg/s. The power of the pump is
60W
600W
720W
1200W
A 40kg girl climbing a flight of stairs expends energy at the rate of 50W. The time taken for her to reach a height of 20m is
16s
32s
80s
160s
A boy of weight 300N climbs to the top of a hill of height 20m. The work done by the boy against the force of gravity is
60000J
6000J
320J
15J
Under which of the following conditions is work done.
A man supports a heavy Load above his head with his hands
A woman holds a pot of water
A boy climbs unto a table
A man pushes against a stationary petrol tanker.
When velocity is plotted against the time taken, the gradient of the uniform graph obtained gives____
Speed
Acceleration
Uniform speed
Velocity
In a v-t graph, area of the entire shape obtained gives
Acceleration
Distance
Deceleration
Total distance travelled
The unit of linear expansivity is
m/k
mk
K
K-1
A copper rod is 3m long at a certain temperature. Calculate the length for a temperature rise of 100k if the linear expansivity of copper is 17x10-6 k-1.
3.0051
3.0017
3.5100
3.0017.
A garage hoist lifts a truck up 2 meters above the ground. Find the workdone by the truck. [Given: 1000 kg as the mass of the truck]
19620 J
19800J
17900J
14452J
How much net force is required to accelerate a 1000 kg car at 4.00 m/s2?
4000 N
6000N
4600N
3420N
Aimee has a toy car mass of 2 kg. How much force should she apply to the car so that it should travel with the acceleration of 8 m/s2?
13N
12N
15N
16N
The mass of the object is 1500 g. Find the weight of the object on the earth? (g = 10N/kg)
150N
1500N
15000N
15N
Which of the following statements about the mass and the weight of a body is not correct? Its
mass is a scalar quantity
weight is a function of the gravitational pull on it
mass on earth and on the moon is the same
weight is a scalar quantity
Rank the states of matter from weakest to strongest intermolecular forces.
gas, solid, liquid
solid, liquid, gas
gas, liquid, solid
solid, gas, liquid
Rank the states of matter from slowest to fastest particle speed.
gas, solid, liquid
solid, liquid, gas
gas, liquid, solid
solid, gas, liquid
the speed of an object changes.
an object's distance from another object changes.
there is an increase or decrease in an object's speed.
none of the above
The speed and direction of an object's motion.
An increase or decrease in speed, or a change in direction.
The tendency of an object to resist change in its motion.
An increase or decrease in magnitudes and directions
