Atheelah Arendse

6.1 State the Doppler effect. (2) 6.2 Use the graph to answer the following questions. 6.2.1 Write down the frequency of the sound emitted by the stationarysource.Give a reason for the answer. (2)6.2.2 In which direction is the car moving relative to the source?Choose from TOWARDS or AWAY.Give a reason for the answer. (2)6.2.3 Calculate … Read more

A demolition ball is used by a crane to break the wall of a building.The demolition ball, of mass 1 250 kg, is lifted by the crane to a point R at a height of5,8 m above its lowest position in 60 s.Ignore air friction. 5.1 Define the term power in words. (2) 5.2 Calculate … Read more

A simple rocket system consists of two parts, A of mass 3m, and B of mass 2m, asshown in the diagram below. B is stacked on top of A. Ignore ALL external forces on the rocket.4.2 Calculate the velocity of B in terms of v immediately after the internalexplosion. (5)The graph below shows the average … Read more

3.1 Name the force acting on the ball while it is in free fall. (1) The velocity-time graph below represents the motion of the ball from the instant it isthrown upwards until it hits the ground. 3.2 Write down the acceleration of the ball at time t = 1,02 s. (2) 3.3 Consider the areas … Read more

An 8-kg block, on a rough horizontal surface, is connected to a 2-kg block by a lightinextensible string passing over a frictionless pulley, as shown below. The 8-kg blockmoves at a constant speed when pulled by a 29,6 N horizontal force to the right.The frictional force acting on the 8-kg block is 10 N. 2.1 … Read more