College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Consider a mass and spring system. If the mass is pulled by distance x, stretching the spring by x, write the expression for the potential energy.
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- The figure shows an 7.9 kg stone at rest on a spring. The spring is compressed 11 cm by the stone. (a) What is the spring constant? (b) The stone is pushed down an additional 26 cm and released.What is the elastic potential energy of the compressed spring just before that release? (c) What is the change in the gravitational potential energy of the stone-Earth system when the stone moves from the release point to its maximum height? (d) What is that maximum height, measured from the release point? (a) Number Units (b) Number i Units (c) Number i Units (d) Number i Unitsarrow_forwardSQU is trying a new particle accelerator design with a mechanical component using a spring that does not obey Hooke's law. When stretched/compressed x metres, it exerts a force of 39.6x+51.6x2 (a) Compute the work required to stretch the spring from x= 1.0 m to x 1.3 m.arrow_forwardWhen a spring is compressed by 2.0 cm, its spring potential energy is 16.9 J. What will its spring potential energy be if it is stretched by 4.0 cm, in Joule? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.arrow_forward
- A 28 kg child jumps on a spring-driven pogo stick. At one point, the child stands on the stick so that only their weight pushes the spring down. If the spring compresses by 8 cm, a) What is the spring constant of the pogo stick?b) What is the spring potential energy?arrow_forwardA 12.0 kg box is given an initial push that starts it sliding across the floor. It eventually comes to a stop. If the box has an initial velocity of 3.5 m/s, how much work is done by friction to cause it to come to a stop? (Yes, you are correct, you do not know the coefficient of friction.)arrow_forwardThe force law for a non-linear spring is F(x) = -60x1.15 N. Find the work required to compress the spring 30 cm from its resting length.arrow_forward
- Suppose that 60 J of work is done to stretch a bow a distance of 0.5 m. (a) What is the increase in potential energy of the bow? (b) If the spring constant of the bow is 1200 Nt/m, what distance was the bow stretched?arrow_forwardA certain spring is found not to obey Hooke's law; it exerts a restoring force F(x) = -ax² - 6x³ if it is stretched or compressed, where: a = 10.0N/m², B = 300.0N/m³ The mass of the spring is negligible. Calculate the potential energy function U(x) for this spring, if U(x=0) = 0. Find the spring potential energy at x = 0.500 marrow_forward. A pogo stick has a spring with a spring constant of 2.5×104N/m,, which can be compressed 12.0 cm. To what maximum height from the uncompressed spring can a child jump on the stick using only the energy in the spring, if the child and stick have a total mass of 40 kg?arrow_forward
- On Earth with a gravational acceleration g, the potential energy stored in an object varies directly with its mass m and its vertical height h. What is the equations of the potential energy of a 2kg skateboard that is sliding down a ramp?arrow_forwardYour answer is partially correct. The figure shows an 7.8 kg stone at rest on a spring. The spring is compressed 9.9 cm by the stone. (a) What is the spring constant? (b) The stone is pushed down an additional 26 cm and released.What is the elastic potential energy of the compressed spring just before that release? (c) What is the change in the gravitational potential energy of the stone-Earth system when the stone moves from the release point to its maximum height? (d) What is that maximum height, measured from the release point? (a) Number 172 Units N/m (b) Number 49.75 Units J (c) Number 79.75 Units (d) Number 64.7 Units cmarrow_forward
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