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Lecture 3: Kinematics and Dynamics I/ Fill in the blank using words given in the brackets. Each word can be used more than once. Kinematics 1/ ..(1).....................are quantities that have magnitude only. 2/ Vectors are quantities that have ..(2)......................... as well as ..(3)................................ 3/ ....(4).......................... vectors are vectors that lie in the same plane. 4/ ..(5).............. is the length of the path taken while ..(6).....................is the straight-line distance and the direction from a fixed point. ...(5).. ........................is a scalar quantity and ..(6)..............is a vector quantity. 5/ …(7)……... is the …...(8)............… travelled per unit time. Its SI unit is meter per second (ms-1). 6/ ...(9)..............................… is the rate of change of displacement. 8/ ....(10).........................is the rate of the change of velocity. Its magnitude is given by the ... (11)...............or ..(12)............................ of a (v-t) graph. 9/ Consider a body moving with uniform or ...(13)................................. acceleration in a straight-line. 10/ ...(14).................… refers to motion under the influence of a uniform gravitational field without air resistance. 11/ ..(15).........................… refers to the resistive force acting on a body moving through air. Its . (16).................. is always opposite to the direction of motion. Its .(17)... .......depends on the speed and cross-section area of the body, and the density of the air. 12/ The path or the ...(18)............................ of a body, due to uniform velocity in one direction and a uniform acceleration in a perpendicular direction, is a curve called ...(19).......................… 13/………(20)……….: A situation in which the forces acting upon an object are in balance. (scalar, distance, acceleration, gradient, vector, trajectory, co-planar, velocity, constant, slope, magnitude, parabola, displacement, resistance, speed, direction, free falling).

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