Which of the following definition defines an inertial frame of reference?, Accelerating, Non accelerating, Turning, zero, Is displacement a scalar or vector quantity?, Scalar, Vector, If two displacment s are in opposite directions, how are they combined?, added directly, subtracted, A car's speed changes from 30 m/s to 20 m/s in 4.0 s. Calculate its acceleration., -2.5 m/s^2, 12 m/s^2, A rocket ship in outer space accelerates from 1,240 m/s to 1,400 m/s in 5.0s. Calculate its acceleration, 1232 m/s^2, 32 m/s^2, What happens to the horizontal velocity of a projectile throughout its flight?, zero, 1, constant, non constant, which component of a projectile's velocity becomes instantaneously zero?, none, x component, y component, x & y component, In uniform circular motion, what is constantly changing despite a constant speed?, direction, acceleration, velocity, speed, A stone is thrown horizontally at 20 m.s from the top of a cliff 50 m high. How long does it take to reach the bottom?, 2.19 s, 3.19 s, 3.91s, 2.18 s, A plane embarks on a flight SOuth. Its airspeed is 900 km/hr. A steady crosswind blows from the West at 200 km/hr. What will be its resulting speed?, 92.195 km/hr, 9.21 km/hr, 9.21.95 km/hr, 921.95 km/hr

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