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WorksheetsThe beauty of Physics - Enjoy
Total questions: 25
Worksheet time: 13mins
Which of the following statement is not correct
The PE of a body is equal to the work done by the body because of its position
The PE is the ability a body possess to do work because of stored up energy
The PE is the ability a body posseses to do work because of stored up energy owing to the movement of its molecules
A body cab have both Kinetic and potential energy at the same time
A body of mass M is held at P a height h above the ground. If g is the Acceleration due to gravity, it's potential energy at P is mgh. When the body is released
It's total energy decreases
It gains Kinetic energy and therefore its total energy increases
It's potential energy increases
It's total energy at any point between p and the ground is always mgh
Which of the statements is/are correct for a freely falling body?
I. The total energy is entirely Kinetic
II. The ratio of potential energy to Kinetic energy is constant
III. The sum of of potential and Kinetic energy is constant
I only
II only
III
I and III only
A stationary atone at a height X m above the ground posseses one of the following types of energy
Mechanical energy
Stationary energy
Potential energy
Vibrational energy
The equilibrium position of objects in any field corresponds to situations of
Equipotential energy
Maximum potential energy
Minimum potential energy
Maximum Kinetic energy
A stone of mass 1 kg is dropped from a height of 10 m above the ground and falls freely under gravity. It's Kinetic energy 5 m above the ground is equal to
It's Kinetic energy on the ground
Twice it's initial potential energy
It's initial potential energy
Half it's initial potential energy
Two identical boxes are to be carried up a flight of steps. A man X carries one box up in two minutes, but another man Y who stopped twice to rest, completed the assignment in six minutes. What observations is correct?
It is impossible to determine the work done because a machine was not used
The energy expended by X is three times that expended by Y
The power developed by X is more than the average power developed by Y
The work done by Y was less than that done by X
Which of the following statement about Friction is not correct?
Cars are less likely to skid on wet than on dry roads
Sliding Friction is less than limiting Friction
Lubrication reduces Friction
Nails hold board together by Friction
The Friction which operates when one solid surface slides over another is called
Solid Friction
Static Friction
Limiting Friction
Dynamic Friction
Which of the following statements is NOT TRUE of Friction between two solid surfaces
The frictional force between two solid surfaces is greater when one of the objects is moving than when they are both stationary
The frictional force between two rough surfaces is greater than that between two smooth surfaces
The frictional force between two surfaces is independent of the area in contact
Frictional force is proportional to the normal reaction on one of the surfaces
The limiting frictional force between two surfaces depends on
I. The normal reaction between the surfaces
II. The area of the surfaces in contact
III. The relative velocity between the surfaces
IV. The nature of the surfaces
I only
II only
III only
I & IV only
Which of the following statements about Friction is not correct?
The force Kinetic Friction is less than that of static Friction
The force of Kinetic Friction between two surfaces is independent of the area in contact provided the normal reaction is unchanged
Friction may be reduced by lubrication
The angle of Friction is the angle between the normal reaction and the force of Friction
The coefficient of Friction between two perfectly smooth surface is
One
Half
Zero
Infinity
Which of the following statement is not correct? A moving vehicle comes to rest as a result of
The hot gasses coming out of the Exhaust pipe
The frictional force between the brakes and the wheels
The frictional force between the tyres and the surface on which the vehicle is moving
The force applied in the opposite direction on the motion of the vehicle
A man standing on a lift that is descending does not feel any weight because
There is no reaction from the floor of the lift
There is no gravitational pull on the man in the lift
The inside of the lift is airtight
The lift is in vacuum
An additional load to an elastic wire when the elastic limit is already reached will make the wire to
Break
Be strained permanently
Recoil
Vibrate at a high amplitude
The point beyond which a stretched spring does not return to its original length is called the
Breaking point
Elastic limit
Spring constant
Elastic point
In an experiment to determine Youngs Modulus for a wire, several loads are attached to the wire and the corresponding extension measured. The tensile stress in each case depends on
Load and the extension
Load and the radius of the wire
Radius of the wire and the extension
Extension and the original length of the wire
The ratio of tensile stress to tensile strain is known as
Modulus of rigidity
Modulus of elasticity
Shear modulus
Young's modulus
The point at which the molecules of a loaded wire begin to slide across each other resulting in a rapid increase in extension is
Yield point
Proportionality point
Deformation point
Elastic point
Elasticity is the property which enables a material to
Return exactly to its original shape and size on the removal of a force
Remain its deformed shape after the removal of an applied force
Be drawn out in length
Break without warning
The property of a material that allows it to be stretched into a wire is called
Brittleness
Malleability
Fragility
Ductility
Atoms of a solid having crystalline structures are arranged in regular patterns called
Energy levels
Atomic structure
Lattices
Orbits
What is the difference between a crystalline and an amorphous solid? A crystalline solid
Has cubic structure while amorphous has hexagonal structure
Has regular repeating patterns while an amorphous has not
Is white while amorphous is yellow
Is always hard while amorphous solid is always soft
Crystals have the following properties
I. They have definite shape
II. They are insoluble
III. They have definite melting points
Which of the above statements is/are correct?
I & III only
I only
I & II only
I, II & III
