Worksheets12/01/2026 AE: EM- DYNAMICS, WORK ENERGY POWER
Total questions: 10
Worksheet time: 5mins
Which of the following correctly describes centrifugal force?
It is a fundamental interaction force directed towards the center of a circular path.
It is a pseudo force that arises from inertia in a rotating reference frame and is directed away from the center of rotation.
It is the force responsible for the change in the direction of the velocity vector in circular motion.
Its magnitude is given by mrα, where α is the angular acceleration.
The law of conservation of momentum states that the total momentum of an isolated system remains constant. What is the condition for a system to be considered "isolated" in this context?
The total energy of the system is zero.
The resultant external force acting on the system is zero.
The collision within the system is perfectly elastic.
The bodies within the system have equal mass.
A 2 kg ball moving at 10 m/s collides head-on with a 3 kg ball at rest. If the collision is perfectly inelastic, what is the velocity of the combined mass after the collision?
2 m/s
4 m/s
5 m/s
6 m/s
The resultant acceleration of a particle in circular motion is given by ar=at2+ae2 . Under what condition does the resultant acceleration equal the tangential acceleration ( ar=at )?
When the particle is in uniform circular motion.
When the particle is moving along a straight line.
When the particle's angular acceleration is zero.
This condition is never possible.
In the oblique impact of two smooth spheres, which physical quantity associated with each sphere remains unchanged along the plane of impact (perpendicular to the line of impact)?
The component of momentum.
The component of velocity.
Kinetic energy.
The component of impulse.
A force acts on a 2 kg object, causing its velocity to change from 4 m/s to 8 m/s. Calculate the work done on the object.
16 J
32 J
48 J
64 J
A 1 kg body and a 4 kg body have equal kinetic energies. What is the ratio of their momenta (p1 : p4)?
1 : 2
1 : 4
2 : 1
4 : 1
Which statement accurately describes an inelastic collision?
Both momentum and kinetic energy are conserved.
Neither momentum nor kinetic energy is conserved.
Momentum is conserved, but kinetic energy is not.
Kinetic energy is conserved, but momentum is not.
A direct impact is defined as a collision where:
The mass centers of both bodies lie on the line of impact.
The initial velocities of both colliding bodies are directed along the line of impact.
The bodies stick together after the collision.
Kinetic energy is perfectly conserved.
The recoil of a gun after firing a bullet is a direct application of:
The Work-Energy Principle.
The Law of Conservation of Energy.
The Impulse-Momentum Principle.
The Law of Conservation of Momentum.
