grade11

Two points, P and T, are situated 3 mm apart in the electric field of positive charge Q, as shown below 10.1 Draw the electric field pattern around charge Q. (2) The magnitude of the electric field at point P is 4 x 106 N·C-1 and at point T themagnitude is 2,5 x 105 N·C-1. … Read more

A small isolated sphere A, with a mass of 0,2 g, carrying a charge of +7 x 10-9 C,is suspended from a horizontal surface by a string of negligible mass. A secondsphere B, carrying a charge of -8 x 10-9 C, on an isolated stand, attracts sphere A sothat the string forms an angle of … Read more

The gravitational force on a probe, called Curiosity, on the surface of Mars is 3 338 N.The radius of Mars is 3 390 km and the mass of the planet is 6,39 x 1023 kg. 6.1 State Newton’s Law of Universal Gravitation in words. (2) 6.2 Calculate the mass of the probe. (4) 6.3 Calculate … Read more

A crate, with a mass of 25 kg, slides down a plane which is inclined at 15º to thehorizontal. During the first part of the motion, from A to B, there is no friction betweenthe crate and the plane, but part BC has a rough surface. 5.1 Draw a free-body diagram of ALL the forces … Read more

Learners investigate the relationship between the mass of an object and theacceleration it experiences when a constant net force is applied on the object. Theyuse their results to draw the graph below. 4.1 State Newton’s Second Law of Motion in words. (2) 4.2 Calculate the gradient of the graph. (3) 4.3 Hence, determine the net … Read more

A box, with a mass of 45 kg, is pulled with a force of 90 N at an angle of 50º to thehorizontal. The box moves at a CONSTANT VELOCITY. 3.1 Define the term kinetic frictional force. (2) 3.2 State Newton’s First Law of Motion in words. (2) 3.3 Calculate the magnitude of the horizontal … Read more