A planet is in a circular orbit around a star – its radius and speed are constant. Which of the following is constant? Which of the following is not constant? Explain why. a. Kinetic Energy b. Potential Energy c. Linear Momentum d. Angular Momentum
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A planet is in a circular orbit around a star – its radius and speed are constant. Which of the following is constant? Which of the following is not constant? Explain why.
a. Kinetic Energy
b. Potential Energy
c. Linear Momentum
d.
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- 1. Choose the correct answer from the option list below to answer the following parts. a) A ball is rolling across the floor at a constant velocity. What is the value of the change in its kinetic energy, ΔEk? b) A ball starts rolling down a ramp. What is the value of the change in its kinetic energy, ΔEk? c) A ball slows down as it rolls up a hill. What is the value of the change in its kinetic energy, ΔEk? i) Zero ii) Positive iii) Negative! & OD. Mass 2M and speed 3V O E. Mass 3M and speed V *. 60 QUESTION 2 OA. Mass 3M and speed 2V Which of the following bodies has the largest kinetic energy? OB. Mass M and speed 4V OC. All four of the above have the same kinetic energy OA. 4.85 km/h and 39.8⁰ OB. 3.11 km/h and 39.8⁰ OC.3.73 km/h and 39.8⁰ OD.7.80 km/h and 39.8⁰ OE. 6.20 km/h and 39.8⁰ Two skaters collide and embrace in a completely inelastic collision. Alfred, with mass 83.0 kg, is originally moving east with speed 6.20 kmh. Barbara, with mass 55.0 MacBook UESTION 1 tion Status: are stuck kg, is originally moving north with speed 7.80 km/h. Find the magnitude and direction (with respect to +x direction) of the velocity of the couple after collision when they8. One radian equals approximately Your answer 9. If a 14 kg box is raised to a height of 4.0 m on Earth, what is its gravitational potential energy relative to the ground? Your answer Submit Never submit passwords through Google Forms. This form was created inside of Newport News Public Schools. Report Abuse
- 26. Please help me answer this physics question1Two particles are moving uniformly in opposite directions along parallel trajectories. The distance between the trajectories is d, as shown. Find: a. The total linear momentum of the particles. b. The angular momentum of the particles with respect to point O. c. Repeat part b. for points O, and O2. d. Answer the questions a through c if p, = p.
- 1. If both the mass and speed of an object are doubled while the radius is decreased by 4x, then the centripetal force is? 2. A 5 kg object has a kinetic energy of 90 Joules. What is the speed of this object? 3. The momentum of a 500 g object is 2000 kg m/s. What is the speed of this object? 4. A ball is thrown straight upward at an initial speed of 70 m/s. What is the acceleration of the object after 13 seconds? 5. An object is thrown straight upward with a speed of 90 m/s. What is the speed of the object after 13 seconds?2. For a satellite in a circular orbit around the earth, the gravitational force from the earth on the satellite causes the centripetal acceleration. The amount of work done by the gravitational force from the earth on the satelliteA) is zeroB) is greater than zero.C) is less than zero.D) would be different if the masses of the earth and satellite were different.E) can’t be determined without a calculator and some data.i. Prove your answer by using the formula for work, W: (Hint: Consider just a short segment of the orbit, rather than the full revolution.) ii. Prove your answer by talking about the satellite’s kinetic energy, ∆?� ***also please do it i,ii and write a process detail.C7 9.) If the orbit is elliptical, rather than circular, what can be said about the work done by the Sun on Earth? a.) It does not matter whether the orbit is circular or elliptical, no work is done. b.) The work the Sun does on Earth causes the tides. c.) Whether the orbit is circular or elliptical, work must be done to propel Earth around the Sun. d.) If the orbit is elliptical, work is done to speed up or to slow down Earth, depending on its location in orbit. e.) The work the Sun does on Earth accounts for Earth's changes of season.
- 1. Suppose a cart with four wheels and a disk whose mass is equal to the totalmass of the cart roll down the ramp. Which, if either, has more gravitationalpotential energy at the top? 2. Which of those objects has more kinetic energy at the bottom? Why? 3. Imagine the disk just spinning in place instead of rolling. Would it have kineticenergy? Why? 4. Why does the cart have more speed at the bottom even though it doesn’t havemore kinetic energy than the disk?The four 2.18g spheres shown below have q+ve = 16.0nC and d=3.04cm. The spheres are released simultaneously and allowed to move away from each other. What is the speed of each sphere when they are very far apart? q+ve (+ d q+ve d q+ve q+ve