ME 201 (a) The principal of work and energy is useful for solving problems that

Question

ME 201 (a) The principal of work and energy is useful for solving problems that involve force, velocity, and.. (A) acceleration (C) motion (B) displacement (D) power (b) In a perfectly elastic collision, no energy is lost and the relative velocity equals the relative approach velocity of the particles. (A) separation (C) initial (B) travelling (D) striking Mr (c) The passengers on the amusement-park ride experience conservation of about the axis of rotation (the z-axis). (A) linear momentum (C) angular momentum (B) angular impulse (D) energy (d) If a particle moves in the z - y plane, its angular momentum vector is in the (B) z-y direction (D) z direction (A) y-direction . (C) x-direction (e) The roller coaster is released from rest at the top of the hill. As the coaster moves down the .. energy is transformed into . energy hill, (A) potential, elastic (C) potential, kinetic (B) kinetic, potential (D) potential, thermal force will do when a bod (D Potential energy is a measure of the amount of work a changes position. (A) non conservative (C) elastic (B) gravitational (D) conservative Dynamics

Explanation / Answer

a ) ans (B) displacement

because Work = force x displacement

b) ans (A) Separation

c) ans (C) Angular momentum

d) ans (C) X - sirection  

The direction of angular angular momentum is perpendicular of plane of rotation. From the right hand rule, the direction of angular momentum is defined as the direction in which the thumb of our right hand points when we curl our fingers in the direction of rotation

e) ans (C) Potential, Kinatic

Any body which travel from height , it gains kinetic energy by losing potential energy

f) ans (B) Gravitational

Potential energy = mgh

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