Physics Mechanics - Forces, Work, Energy and Motion
Test your understanding of fundamental mechanics concepts including forces, collisions, projectile motion, work-energy theorem, and conservation laws for 11th standard physics.
Questions
A particle is thrown vertically up from the earth with a velocity of 9.8 m/s. At what height will its kinetic energy be reduced to 3/4 of its original kinetic energy?
- 1.225 m
- 1.250 m
- 1.200 m
- 1.215 m
Which of the following given formulas represents the maximum range of the projectile?
- u2g
- ug
- u2/g
- u/g
Which of the following forces is the force that can perform some resultant work along an arbitrary closed path of its point of application?
- Electromagnetic force
- Strong nuclear force
- Torque
- Non conservative force
If the lines of all forces intersect at a common point, the force system is known as
- strong nuclear force
- concurrent force
- power
- electromagnetic force
Which of the following forces is important in certain types of nuclear processes, such as Beta-decay?
- Strong nuclear force
- Electromagnetic force
- Weak nuclear force
- Torque
Which of the following theorems states that if three forces acting at a point are in equilibrium then each of the force is directly proportional to the sine of the angle between the remaining two forces?
- Cauchy's theorem
- Pythagoras theorem
- Lami's theorem
- Leibnitz theorem
Whenever a body slides over another body, a force comes into play between the two surfaces in contact and this force is known as which of the following forces?
- Gravitational force
- Frictional force
- Electromagnetic force
- Strong nuclear force
A force system when the lines of the action of all forces in one plane is
- electromagnetic force
- strong nuclear force
- power
- coplanar force
If the kinetic energy of the system is conserved during a collision then it is called which of the following techniques?
- Collision
- Calcination
- Killing and fixation
- Elastic collision
Which of the following theorems states that the work done by a force acting on the body during its displacement is equal to the change in kinetic energy of the body during displacement?
- Law of conservation of momentum
- Cauchy's theorem
- Work energy theorem
- Pythagoras theorem
Which of the following laws states that everybody continues in its state of rest or of uniform motion along a straight line unless it is compelled by an external force to change that state?
- Newsland's law
- Periodic motion law
- Newton's first law of motion
- Bernoulli law
Which of the following given equations represents the equation of path of the projectile?
- y = mx + c
- x cos A + y cos B = p
- y = x tan A - (gx2/2u2 cos 2A)
- bx + ay = ab
If the work done by a force in moving a body between two positions is independent of the path followed by the body then, such type of force is called which of the following?
- Conservative force
- Power
- Strong nuclear force
- Electromagnetic force
Which of the following forces is the force in which the interacting objects are physically in contact with each other?
- Strong nuclear force
- Torque
- Contact force
- Electromagnetic force
Which of the following laws states that if a body or system of bodies is in motion under a conservative system of forces then the sum of its kinetic energy and potential energy is constant?
- Law of conservation of momentum
- Einstein law
- Bernoulli law
- Law of conservation of energy
If there is a loss of kinetic energy during the collision between two bodies then it is called which of the following techniques?
- Collision
- Killing and fixation
- Intersection
- Inelastic collision
Which of the following forces is a single force that acts along with the other forces to keep the body in equilibrium?
- Strong nuclear force
- Torque
- Electromagnetic force
- Equilibrant
Which of the following is called the rate of change of angular displacement?
- Uniform velocity
- Instantaneous velocity
- Angular displacement
- Angular velocity
Which of the following given formulas represents the range of a projectile?
- u(2h/g)
- u√(2h/g)
- u(h/g)
- u√(h/g)
Which of the following given options is said to be done by force or against the direction force when the point of application of the force moves towards or against the direction of force?
- Torque
- Energy
- Power
- Work