1) Units for speed or velocity a) m/s b) sec c) Newtons d) Joules 2) Units for energy or work a) mph b) Joules c) m/s2 d) Newtons 3) Units for force a) m b) sec c) Newtons d) watts 4) Units for acceleration a) m/s b) watts c) Newtons d) m/s2 5) Unit for power a) Newtons b) watts c) m/s2 d) m 6) Weight is measured in  a) kg b) Newtons c) m/s2 d) m 7) Distance is measured in a) m b) km c) miles d) cm e) all of the answers are correct 8) Gravity is a) 9.8 N b) 9.8 m/s2 c) 9.8 m/s d) 9.3 J 9) Velocity is a) speed b) direction c) a vector d) measured in m/s2 10) Two vectors can be combined to give a   a) resultant vector b) a right triangle c) the hypotenuse d) two vectors cannot be combined 11) All of the forces acting on an object a) are impossible to draw b) always equal zero c) have to have a normal force d) can be represented by a free-body diagram 12) The normal force is a) always drawn perpendicular to the supporting surface b) in the opposite direction of gravity c) in the same direction as gravity d) at right angles to gravity 13) An object in free-fall (in the absence of friction) a) has a normal force in the same direction as gravity b) is being acted upon by gravity alone c) will no longer accelerate d) will slow down as it falls 14) In the absence of friction a) two objects of unequal mass will fall at the same rate b) a larger mass will hit the ground first c) a smaller mass will hit the ground first d) the mass doesn't affect how fast it falls, but the size does 15) A bullet is fired from a gun and a bullet is dropped at the same time, from the same height. In the absence of friction, which hits the ground first? a) the dropped bullet b) the fired bullet c) they hit at the same time 16) The horizontally velocity of a projectile at the top of it's path is always a) zero b) the same as it is anywhere else along its path c) slower going up than down d) slower going down than up 17) The difference between speed and velocity is a) there is no difference b) speed is m/s and velocity is m/s2 c) velocity has a direction d) speed is m/s2 and velocity is m/s

Physics Units and Terms

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