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Practice MCQs on dynamics, physics MCQs for online test prep. Mechanics and properties of matter quiz has multiple choice questions (MCQ), dynamics quiz questions and answers as in elastic collisions,, answer key with choices as only total momentum of colliding objects is conserved., only total kinetic energy is conserved., both of momentum and total kinetic energy are conserved. and neither momentum of colliding bodies nor total kinetic energy are recoverable. for competitive exam prep. Free study guide is to learn dynamics quiz online with MCQs to practice test questions with answers.

MCQ. In elastic collisions,

1. only total momentum of colliding objects is conserved.
2. only total kinetic energy is conserved.
3. both of momentum and total kinetic energy are conserved.
4. neither momentum of colliding bodies nor total kinetic energy are recoverable.

C

MCQ. Force that acts on a mass of 1 g and gives it an acceleration of 1 cm s-2 is defined as

1. 1 newton
2. 1 dyne
3. 1 pound-force
4. 1 pa-force

B

MCQ. Einstein's mass-energy relationship states that if mass decreases by Δm, energy released ΔE is given by

1. ΔE = Δm × c, where "c" denotes speed of light.
2. ΔE = Δm × c², where "c" denotes speed of light.
3. ΔE = Δm ⁄ c, where "c" denotes speed of light.
4. ΔE = Δm ⁄ c², where "c" denotes speed of light.

B

MCQ. When work done in moving a particle round a closed loop in a field is zero, forces in field are called

1. Zero forces
2. Non-Conservative forces
3. Conservative forces
4. Viscous forces

C

MCQ. Dimensions of relative density are

1. masslength-3
2. mass x length3
3. It has no dimensions, since it's a ratio of two densities
4. length3/mass

C

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