1.5. Forces
A subsection of Physics, 5054, through 1. Motion, forces and energy
Listing 10 of 316 questions
shows the directions of four forces acting on a racing car as it travels in a horizontal straight line. force C force A force B force D Draw a line from each box on the left to the correct description of each force. force A force B force C force D driving force contact or normal reaction force air resistance and friction force of gravity The table shows the sizes of the forces acting on the car at one time. force A / N force B / N force C / N force D / N The gravitational field strength g is 10 N / kg. Calculate the mass of the car, mass = the resultant force on the car, resultant force = the acceleration of the car. acceleration = At another time, the car is travelling at speed u. It then accelerates for 5.0 s with an acceleration of 1.6 m / s2, and reaches a speed of 20 m / s. Calculate the value of u. u =
5054_s17_qp_21
THEORY
2017
Paper 2, Variant 1
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shows a man pushing a heavy box with a force P. A frictional force F acts in a horizontal direction. F P The forces on the box are balanced and the box is stationary. State what is meant by balanced forces. The frictional force in does not produce any heating effect. State what must happen for the frictional force to produce heating. Apart from being stationary, describe one other possible state of motion of the box when the forces are balanced. When P = 100 N and F = 85 N, the box accelerates. The mass of the box is 25 kg. Calculate the acceleration of the box. acceleration =
5054_s18_qp_21
THEORY
2018
Paper 2, Variant 1
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Questions Discovered
316