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Revision Pack Grade 11 a Qs1.A ball, initially at rest, takes time t to fall through a vertical distance h. If air resistance is ignored, the time taken for the ball to fall from rest through a vertical distance 9h isA.3t.B.5t.C.9t.D.10t.(1)2.A raindrop falling through air reaches a terminal velocity before hitting the ground. At terminal velocity, the frictional force on the raindrop isA.zero.B.less than the weight of the raindrop.C.greater than the weight of the raindrop.D.equal to the weight of the raindrop.(1)3.An athlete runs round a circular track at constant speed. Which one of the following graphs best represents the variation with time t of the magnitude d of the displacement of the athlete from the starting position during one lap of the track?(1)4.A stone is thrown horizontally from the top of a high cliff. Assuming air resistance is negligible, what is the effect of gravitational force on the horizontal and on the vertical components of the velocity of the stone?Vertical component of velocityHorizontal component of velocityA.increases to a constant valuestays constantB.increases continuouslystays constantC.increases to a constant valuedecreases to zeroD.increases continuouslydecreases to zero(1)5.A ball is dropped from rest at time t = 0 on to a horizontal surface from which it rebounds. The graph shows the variation of time t with speed v of the ball.Which one of the following best represents the point at which the ball just loses contact with the surface after the first bounce?A.AB.BC.CD.D(1)6.Juan is standing on the platform at a railway station. A train passes through the station with speed 20 m s–1 in the direction shown measured relative to the platform. Carmen is walking along one of the carriages of the train with a speed of 2.0 m s–1 measured relative to the carriage in the direction shown. Velocity is measured as positive in the direction shown on the diagram.The velocity of Carmen relative to Juan isA.–22 m s–1.B.–18 m s–1.C.+18 m s–1.D.+22 m s–1.(1)7.The graph below shows the variation with time of the distance moved by a car along a straight road. During which time interval does the car have its greatest acceleration?(1)8.The variation with time t of the speed v of a car moving along a straight road is shown below.Which area, S1, S2 or S3, or combination of areas, represents the total distance moved by the car during the time that its speed is reducing?A.S1B.S3C.S1 + S3D.S1 + S2 + S3(1)9.Four cars W, X, Y and Z are on a straight road. The graph below shows the variation with time t of the distance s of each car from a fixed point.Which car has the greatest speed?A.WB.XC.YD.Z(1)10.A boat is moving in the direction shown with a speed of 5 m s?1 as measured by Nico who is at rest on the beach. Aziz walks along the deck of the boat in the direction shown with a speed of 2 m s?1 measured relative to the boat.If velocity is measured as positive in the direction shown, the velocity of Nico relative to Aziz isA.? 7 m s?1.B.? 3 m s?1.C.+ 3 m s?1.D.+ 7 m s?1.(1)11.Two points P and Q are at distances r and 2r respectively from the centre of a compact disc (CD) as shown.When the disc is rotating about its centre, the ratio of the A.B.1.C.D.2.(1)12.A ball is thrown vertically upwards from the ground. The graph shows the variation with time t of the vertical displacement d of the ball.Which one of the following gives the final displacement after time T and the average speed between time t = 0 and time t = T?DisplacementAverage speedA.00B.0C.2DD.2D0(1)13.The graph below shows the variation with time t of the displacement d of a body moving along a straight-line.Which graph best represents the variation with time t of the velocity v of this body?(1)14.The graph below shows the variation with time t of the displacement s of an object moving along a straight-line.The best estimate of the instantaneous speed of the object at t = 2.0 s isA.0.0 ms–1.B.0.2 ms–1.C.5.0 ms–1.D.10.0 ms–1.(1)15.An object is falling, in air, towards the Earth’s surface.What changes occur in the acceleration and in the velocity of the object as it approaches terminal velocity?accelerationvelocityA.decreases to zeroincreases continuouslyB.decreases to zeroincreases to a constant valueC.constantincreases to a constant valueD.constantincreases continuously(1)16.A car has a speed of + 15 m s–1 relative to the ground. It passes a cyclist travelling in the same straight-line. The speed of the car relative to the cyclist is + 12 m s–1.The speed of the cyclist relative to the ground isA.–3.0 m s–1.B.–1.5 m s–1.C.+1.5 m s–1.D.+3.0 m s–1.(1)17.A ball is thrown vertically upwards from the ground. The graph shows the variation with time t of the vertical displacement d of the ball.Which of the following gives the final displacement after time T and the average speed between time t = 0 m aand time t = T?DisplacementAverage speedA.00B.0C.2DD.2D0(1) ................
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