1. Motion, forces and energy
A section of Physics, 5054
Listing 10 of 1150 questions
shows an elastic rope . elastic rope The unstretched length of the rope is 0.80 m. A student uses the hook at one end to suspend the rope from a shelf and hangs an empty paint can of mass 0.70 kg from the other end. The rope stretches to a length of 0.97 m but does not exceed its limit of proportionality. Explain what is meant by limit of proportionality. State what is meant by: mass weight. The gravitational field strength is 10 N / kg. Calculate the weight of the empty paint can. weight = For the rope, calculate a value for load extension . load extension = The student repeatedly pours small volumes of paint into the can. When there is 2.5 × 10–3 m3 of paint in the can, the total length of the rope is 1.70 m. This is where the rope reaches the limit of proportionality. Determine the mass of the paint in the can. mass = The student continues to pour paint into the can until there is a volume of 5.0 × 10–3 m3 in it. He notices that the elastic rope becomes harder to stretch after the limit of proportionality. He plots a graph of the total length of the rope against the volume of paint added. On , sketch the length-volume graph for the range 0 to 5.0 × 10–3 m3. 2.5 5.0 1.70 volume of paint / 10–3 m3 limit of proportionality total length / m The student suddenly removes the can from the end of the stretched rope and, as it contracts, the rope jumps into the air. State the energy change that is taking place in the rope as it contracts and jumps into the air.
5054_w19_qp_22
THEORY
2019
Paper 2, Variant 2
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Questions Discovered
1150