Kinematics
Physics Kinematics Test - Free Online Physics Preparation and Practice Test for Engineering Entrance, IIT, AIEEE, CET, BITSAT, Medical Entrance AIIMS, AIPMT and B.Sc, NDA Exams
Questions
If momentum of a body is increased by 100%, then the percentage increase in kinetic energy is
- 200%
- 225%
- 150%
- 300%
A force vector (2i + 3j + 4k) N makes a body to move with a velocity of (3i - 2j + 5k) m/sec. The power applied in Watts is
- 20
- 15
- 10
- 5
A body weighs 1.5 kg. What is its rest energy in Joules?
- 15 X 1016
- 20 X 1016
- 13.5 X 1016
- 20 X 1017
The number of significant figures in 900.08 is
- 1
- 4
- 5
- 2
The unit of Stefan's constant is
- J/sec m2 K-4
- kg sec-3 K-4
- watt m-2 K-4
- N m sec-1K-4
A force of 100 N displaces a body through 5 m. If the change in kinetic energy is 400 J, the energy lost in friction is
- 100 J
- 200 J
- 300 J
- 400 J
A force of (2i + 3j + 4k) N makes a body to displace through (3i -2j + 5k) m . The work done is
- 20 J
- 15 J
- 10 J
- 5 J
The length, breadth and height of a rectangular solid is 1.45 cm, 1.25 cm and 1.37 cm respectively. The volume of the solid in cm3 corrected to significant figures is
- 2.483125
- 2.48313
- 2.483
- 2.48
The graph which is used to find the work done is
- Velocity - Time
- Acceleration - Time
- Force - Time
- Force - Displacement
The modulus of elasticity is dimensionally equivalent to
- Strain
- Surface tension
- Stress
- Coefficient of viscosity
The coefficient of friction obeys which of the following rules?
- Rolling friction is the least
- Static friction is the least
- Kinetic friction is the least
- None of the above
If a body is projected vertically up, its time of flight is
- proportional to initial velocity
- proportional to square of the initial velocity
- proportional to inverse of initial velocity
- proportional to inverse of square of initial velcoity
The ______ parameter does not influence the moment of inertia.
- mass distribution
- angular velocity
- axis of rotation
- mass
Kinetic energy of a body is
- vector
- scalar
- psuedo vector
- independent of velocity
Find the linear momentum of a truck of mass 5000 kg moving at a speed of 75 m/sec in kg-m/sec.
- 375000
- 3750000
- 37500000
- 375000000
If F is force and r is the radius vector T, then torque is given by
- r.F
- rF
- rXF
- r/F
An iron block of sides 50 cm x 8 cm x 15 cm has to be pushed along the floor. The force required will be minimum when the surface of the contact with ground is
- 8 cm x 15 cm
- 50 cm x 15 cm
- 50 cm x 8 cm
- Force is the same for all surfaces
Centre of mass is
- a point
- both scaler and vector
- scalar
- vector
The ______ energy is stored in a spring wound of a watch.
- kinetic
- heat
- electrical
- potential
The centre of mass of a body
- always lies outside the body
- always lies inside the body
- always lies on the surface of the body
- all of the above
Rotating top is based on law of conservation of
- energy
- mass
- linear velocity
- angular momentum
If C is the capacitance of a capacitor and V is the potential difference across it, the dimensional formula for CV2 is
- ML2T-1
- MLT-2
- MLT-3
- ML2T-2
The dimension of time in electric field intensity is
- - 3
- - 2
- - 1
- 2
The work done in raising a car of 1000 Kg mass by 3 meters above the ground is (g = 9.8 m/sec2)
- 30,400 J
- 29,400 J
- 28,400 J
- 27,400 J
The displacement of a particle moving along x-axis is given as x = at + bt2 - ct3, where t is time. The respective dimensions of a, b and c are
- L2, T, LT2
- LT2, LT, LT-2
- LT-1, LT-2, LT-3
- L, LT, T2