Physics - Mechanics
Exam Duration: 60 Mins Total Questions : 30
Match the Columns
Quantity | Unit |
A. Luminous intensity | 1. Kelvin |
B. Amount of substance | 2. Candela |
C. Time | 3. Second |
D. Temperature | 4. Mole |
- (a)
A B C D 2 4 3 1 - (b)
A B C D 4 2 3 1 - (c)
A B C D 2 1 4 3 - (d)
A B C D 4 3 2 1
Which one of the following is vector quantity?
- (a)
Momentum
- (b)
Pressure
- (c)
Energy
- (d)
Work
Maxwell is unit of
- (a)
Permeability
- (b)
Magnetic flux
- (c)
Magnetic susceptibility
- (d)
Intensity of magnetization
Consider the following statement
1. Distence of stars is measured in light year
2. One astronomic unit (AU) is equal to 1495-1011m.
3. One parallax second (parsec is equal ) to 3.08*1016m
Which of the statements given below is/are correct ?
- (a)
Only 1
- (b)
1 and 2
- (c)
Only 2
- (d)
1, 2 and 3
A ball P is droped vertically and another ball Q is thrown horizontally with the same velocities from the same height and at the same time. If air resistance is neglected, then
- (a)
Ball P is reached the ground firstt
- (b)
Ball Q is reaches the ground first
- (c)
Both reaches the ground ath the same time
- (d)
The repective masses of the two balles will decide the time
An athlete diving off high spring board can perform a variety of exercise in the air before entering the water body. Which one of the following parameter will remain constant during the fall?
- (a)
The athlete's linear momentum
- (b)
The athlete's angular momentum
- (c)
The athlete's kinetic energy
- (d)
The athlete's moment of inertia
Consider the following statements
1. In railway track or road, the inner track/edge is comparatively less in height than the outer.
2. Washing machine is working on the principle of centrifugation.3. A car takes a turn on level road. It may be thrown outwards because of the lack of centripetal force.
Which of the statements given above is/are correct?
- (a)
1, 2 and 3
- (b)
1 and 3
- (c)
2 and 3
- (d)
Only 3
The cat survive fall from height much more than human or any other animal. It is because the cat
- (a)
has elastic bones
- (b)
has thick and elastic skin
- (c)
can immediately adjust itself to land on all four paws and absorbs the impact of fall by bending
- (d)
None of the above
Match the lists
List I | List II |
A. Motion of billiards ball | 1. One-dimensional motion |
B. Motion of flying insect | 2. Two-dimensional motion |
C. Motion of freely falling body | 3. Three-dimensional motion |
- (a)
A B C 1 2 3 - (b)
A B C 1 2 3 - (c)
A B C 2 3 1 - (d)
A B C 3 2 1
A piece of paper and cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously?
- (a)
They must have the same volume
- (b)
They must have same density
- (c)
They must have the same mass
- (d)
The must be dropped in Vaccum
For a particle revolving in a circular path with constant speed, the acceleration of the particle is
- (a)
along the tangent
- (b)
along the radius
- (c)
zero
- (d)
along the circumference of the circle
Water flows out of the hole of a bucket and follows a parabolic path. If the bucket falls freely under gravity, the water (ignoring air resistance)
- (a)
follows a straight line path relative to the falling bucket.
- (b)
follows a parabolic path relative to the falling bucket
- (c)
stops
- (d)
decreases but continues to flow
For a body moving with constant speed in a horizontal circle, which of the following remains constant?
- (a)
Velocity
- (b)
Acceleration
- (c)
Centripetal force
- (d)
KE
Consider the following statements
1. When a coolie carrying a load on his head moves on a horizontal platform, the work done by the coolie against gravity is zero.
2. when a satellite revolves in a circular orbit around the earth, the work done by the gravitational force on the satellite is zero.
3. when a body falls freely under gravity, the work done by gravity is negative.
4. work is a scalar quantity
Which of the statement(s) given above is/are correct?
- (a)
1 and 2
- (b)
2 and 3
- (c)
Only 4
- (d)
1, 2 and 4
A metal ball and a rubber ball of the same mass are dropped from the same height. After hitting the floor, the rubber ball rises higher than the metal ball, why?
- (a)
Momentum is not conserved when the metallic ball hits the floor
- (b)
the rubber ball hits the floor with greater velocity
- (c)
Momentum is not conserved when rubber ball hits the floor
- (d)
None of the above
Which of the following are the characteristic of an inelastic collision?
1. Momentum is conserved.
2. Total energy is conserved.
3. Kinetic energy is conserved.
4. All the forces must be of conservative nature.
Choose the correct answer from the codes given below
- (a)
3 and 4
- (b)
1 and 2
- (c)
1, 2 and 4
- (d)
2 and 4
A force F is applied on a body (which moves on a straight line) for a duration of 3 s. The momentum of the body changes from 10 g cm/s to 40 g cm/s. The magnitude of the force F is
- (a)
10 dynes
- (b)
10 newtons
- (c)
120 dynes
- (d)
12 dynes
When the velocity of the body is doubled
- (a)
its KE is doubled
- (b)
its PE is doubled
- (c)
its momentum is doubled
- (d)
its acceleration is doubled
If a bomb dropped from an airplane explodes in mid-air
- (a)
its KE increases
- (b)
its total energy increases
- (c)
its total energy decreases
- (d)
None of the above
Consider the following statements
1. The maximum static frictional force is equal to the area of surface in contact.
2. The maximum static frictional force is independent of the area of surface in contact.
3. The limiting friction is always greater than the dynamic friction.
4. The coefficient of friction between two surfaces increases as the surface in contact are made rough.Which of the statement(s)
is/ are not true?
- (a)
1 and 2
- (b)
Only 1
- (c)
2, 3 and 4
- (d)
3 and 4
Consider the following statements
1. Friction is a non-conservative force which always opposes the motion of a body over the other.
2. the usual methods of reducing friction are polishing of surfaces, lubrication with oil or grease, use of ball bearing etc.
3. Friction due to air is considerably reduced by streamlining the shape of the body.
4. Friction depends upon the nature of the material of surfaces in contact.
Which of the statement(s) is/are correct?
- (a)
1 and 2
- (b)
2 and 3
- (c)
1, 2, 3 and 4
- (d)
Only 4
Consider the following statements
1. static force of friction is greater than kinetic or sliding force of friction.
2. Rolling force of friction is less than kinetic or sliding force of friction.
Which of two statement(s) given above is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
Both 1 and 2
- (d)
Neither 1 nor 2
The weight of the body at the centre of the earth is
- (a)
infinite
- (b)
zero
- (c)
slightly less than at the equator
- (d)
slightly more than that at the equator
A geostationary satellite should be launched such that it moves from
- (a)
South to North in the polar plane
- (b)
North to South in the polar plane
- (c)
West to East in the equatorial plane
- (d)
East to West in the equatorial plane
A satellite revolves around the earth in a circular orbit. If gravitational pull suddenly disappear, the it
- (a)
falls down with increasing speed
- (b)
continues to move with the same speed and along the same path.
- (c)
moves with the same speed tangential to the original orbit
- (d)
comes to rest after moving a certain distance along the original path
Match the following lists
List I | List II |
A. Formation of day and nidht | 1. Geostationary satellite |
B. Short range warning about environment | 2. Polar satellite |
C. Longer-term forecasting about environment | 3. Rotation of earth around the sun |
D. Formation of tide in ocean | 4. Gravitational attraction between moon and ocean water |
- (a)
A B C D 1 2 3 4 - (b)
A B C D 3 1 2 4 - (c)
A B C D 4 3 2 1 - (d)
A B C D 3 4 2 1
Consider the following statements
1. When a satellite is orbiting in its orbit, no energy is required to keep it in its orbit.
2. When the total energy of a satellite is negative, it will be moving in either a circular or an elliptical orbit.
3. When the total energy of a satellite is zero, it will escape away from its orbit and its path becomes parabolic.
4. When the total energy of a satellite is positive, it will escape away from the orbit following a hyperbolic path.
Which of the statements given above are correct?
- (a)
1, 2 and 3
- (b)
1, 3 and 4
- (c)
2, 3 and 4
- (d)
1, 2, 3,4
Match the following lists
List I | List II |
A. Every planet revolves around the sun in elliptical orbit and the sun is situated at one foci of ellipse | 1. Copernicus |
B. The position vector of the particle with respect to the centre of force has a constant areal velocity | 2. Ptolemy |
C. Geocentric theory of planetary motion | 3. Inverse square law |
D. Heliocentric theory of planetary motion | 4. Law of conservation of angular momentum |
- (a)
A B C D 3 4 2 1 - (b)
A B C D 1 2 3 4 - (c)
A B C D 4 3 2 1 - (d)
A B C D 2 1 3 4
If a hole is bored along a diameter of the earth and a stone is dropped into the hole. It will
- (a)
reach the centre of the earth and stop here
- (b)
execute SHM about the centre of the earth
- (c)
reach the other side of the earth and stop there
- (d)
execute oscillatory but not simple harmonic motion about the centre of earth
In step-down transformer, the AC output gives the
- (a)
current more than the input current
- (b)
Current less than the input current
- (c)
Current equal to the input current
- (d)
Voltage more than the input voltage