Module 4

Question 1

dynamics

Answer 1

deals with motion of bodies under action of Fs

Question 2

2 distinct parts of dynamics

Answer 2

kinematics, kinetics

Question 3

kinematics

Answer 3

study of motion of bodies without reference to the forces which either cause the motion or are generated as a result of motion

Question 4

kinetics

Answer 4

study of relationship between motion and the corresponding forces which cause or accompany motion

Question 5

rectilinear motion

Answer 5

particle moves along straight line

Question 6

displacement

Answer 6

change of particle with respect to certain fixed point

Question 7

acceleration

Answer 7

rate of change of velocity of particle with respect to time

Question 8

instantaneous acc

Answer 8

the acc of a particle at a particular point of line

Question 9

D’Alembert’s principle

Answer 9

resultant of system of forces acting on a body in motion is in dynamic eqm with the inertia force

Question 10

energy

Answer 10

capacity to do work

Question 11

work

Answer 11

force x displacement

Question 12

curvilinear motion

Answer 12

whenever the particle moves and describes a curved path

Question 13

projectile

Answer 13

particle which is projected into space at an angle to the horizontal

Question 14

trajectory

Answer 14

path traced by projectile

Question 15

velocity of projection

Answer 15

velocity with which projectile is projected into space

Question 16

angle of projection

Answer 16

angle with horizontal at which projectile is projected

Question 17

time of flight

Answer 17

time during which the projectile is in motion

Question 18

range

Answer 18

horizontal distance between the point of projection and hits the ground

Question 19

horizontal range

Answer 19

horizontal distance between the point of projection and the point where the horizontal line through the point of projection meets the trajectory

Question 20

point of projection

Answer 20

point from which the projectile is projected into the space

Question 21

momentum

Answer 21

product of mass and velocity