The battery in the circuit diagram below has an emf of 12 V and an internal resistanceof 0,5 Ω. Resistor R has an unknown resistance. 8.1 What is the meaning of the following statement?The emf of the battery is 12 V. (2) The reading on the ammeter is 2 A when switch S is OPEN. … Read more
Three small identical metal spheres, P, S and T, on insulated stands, are initiallyneutral. They are then charged to carry charges of -15 x 10-9 C, Q and +2 x 10-9 Crespectively, as shown below. The charged spheres are brought together so that all three spheres touch each otherat the same time, and are then … Read more
The alarm of a vehicle parked next to a straight horizontal road goes off, emittingsound with a wavelength of 0,34 m. A patrol car is moving at a constant speed on thesame road. The driver of the patrol car hears a sound with a frequency of 50 Hz lowerthan the sound emitted by the alarm. … Read more
The diagram below, not drawn to scale, shows a vehicle with a mass of 1 500 kgstarting from rest at point A at the bottom of a rough incline. Point B is 200 m verticallyabove the horizontal. The total work done by force F that moves the vehicle from point A to point B in … Read more
4.1 Define the term momentum in words. (2) 4.2 Will the girl-roller-skate combination move TO THE RIGHT or TO THE LEFT after the parcel is thrown?NAME the law in physics that can be used to explain your choice of direction. (2) The total mass of the roller skates is 2 kg. 4.3 Calculate the mass … Read more
In a competition, participants must attempt to throw a ball vertically upwards pastpoint T, marked on a tall vertical pole. Point T is 3,7 m above the ground. Point T may,or may not, be the highest point during the motion of the ball. One participant throws the ball vertically upwards at a velocity of 7,5 … Read more
A block, of mass 8 kg, is placed on a rough horizontal surface. The 8 kg block, which isconnected to a 2 kg block by means of a light inextensible string passing over a lightfrictionless pulley, starts sliding from point A, as shown below. 2.1 State Newton’s Second Law in words. (2) 2.2 Draw a … Read more
1.1 Inertia is the tendency of an object to … A maintain its mass.B continue in a state of non-uniform motion.C remain at rest or in the state of uniform motion.D maintain its velocity when a non-zero net force is acting on it. (2) 1.2 A person stands on a bathroom scale that is fixed … Read more
10.1 Prove that: 10.2 Hence, or otherwise, prove that: [16] TOTAL: 150