1.5.1. Effects of forces
A subsection of Physics, 0625, through 1. Motion, forces and energy
Listing 10 of 314 questions
State two properties of an object that may be changed by the action of forces. 1. 2. A chest expander is a piece of equipment used by athletes in a gym. shows a chest expander that consists of five identical springs connected in parallel between two handles. springs Each spring has an unstretched length of 0.63 m. Two athletes are stretching the chest expander by pulling on the two handles in opposite directions. The springs obey Hooke’s law. Explain what is meant by this statement. Each athlete pulls the handle towards himself with a force of 1300 N. 1. State the tension in each spring. tension = 2. The chest expander stretches and each spring is now 0.94 m long. Calculate the spring constant k of each spring. k = State the energy changes taking place as the two athletes use their muscles to stretch the chest expander.
0625_w19_qp_41
THEORY
2019
Paper 4, Variant 1
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On , draw a graph of extension against load for a spring which obeys Hooke’s law. extension load State the word used to describe the energy stored in a spring that has been stretched or compressed. shows a model train, travelling at speed v, approaching a buffer. model train buffer spring The train, of mass 2.5 kg, is stopped by compressing a spring in the buffer. After the train has stopped, the energy stored in the spring is 0.48 J. Calculate the initial speed v of the train. v =
0625_m16_qp_42
THEORY
2016
Paper 4, Variant 2
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shows the load-extension graphs for two springs, A and B. extension / mm load / N spring A spring B Determine the extension of spring A for a load of 10 N. extension = mm State which spring is easier to stretch and give a reason for your answer. spring reason A different spring is suspended from the edge of a bench, as shown in . 19.7 cm bench 43.9 cm pin spring metre rule 100 cm mark 100 cm mark load = 6.0 N With no load on the spring, the pin points to 19.7 cm on the metre rule, as shown in . When a load of 6.0 N is attached to the spring, the pin points to 43.9 cm, as shown in . Calculate the extension of this spring for a load of 6.0 N. extension = cm Describe how a student could use the equipment in to obtain accurate readings for a load-extension graph for this spring.
0625_m18_qp_32
THEORY
2018
Paper 3, Variant 2
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Questions Discovered
314