A camera weighing 23 N falls from a small drone hovering 30 m overhead and enters free fall. What is the gravitational potential energy change (in J) of the camera from the drone to the ground if you take the following reference points? What is the gravitational potential energy (in J) of the camera at the following times if the reference point of zero gravitational potential energy is taken to be a second person looking out of a building 40 m from the ground? before it falls from the drone after the camera lands on the ground

A 3 kg toy car sits at the highest point of a 13 m high hill. The car is gently pushed forward until it begins to roll down the slope. Assuming the car coasts freely, without any friction or air resistance, how much kinetic energy (KE) and potential energy (PE) will it have at each of the indicated points? Complete the diagram by placing the correct label in each bin. Use g = 10 m/s^2 for the acceleration due to gravity. The diagram is not drawn to scale.

A camera weighing 15 N falls from a small drone hovering 35 m overhead and enters free fall. What is the gravitational potential energy change of the camera from the drone to the ground if you take a reference point of a. the ground being zero gravitational potential energy? APE b. The drone being zero gravitational potential energy? APE What is the gravitational potential energy of the camera (with the reference point of zero gravitational potential energy taken to be a second person looking out of a building 30 m from the ground) c. before it falls from the drone? PE=| d. after the camera lands on the ground? PE Submit Question

A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass of the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, what is the potential energy of the loaded cart at the height of the seat top?  Referring to the previous item, what will happen to the potential energy of the cart if its mass increases four times?

Suppose the pendulum bob in the figure(Figure 1) has a mass of 0.35 kg and is moving to the right at point B with a speed of 2.7 m/s a) What is the change in the system's gravitational potential energy when the bob reaches point A? b) What is the speed of the bob at point A? If the mass of the bob is increased, does your answer to part (a) increase, decrease, or stay the same? Explain. If the mass of the bob is increased, does your answer to part (b) increase, decrease, or stay the same? 1.2 m

What is absolute zero?     What is kinetic energy and potential energy? Give examples.     You have a ball in your hand above the ground at rest which you then drop.  What energy is involved in each part of this situation and how do we know that total mechanical energy has been conserved?  Explain with and without air resistance present.   A boulder and a pebble are sitting on a cliff, which has greater gravitational potential energy and why? A cheetah and a person are racing, both has the same mass, which has a greater kinetic energy and why? What is temperature? How does an objects temperature relate to motion of the molecules?     What is heat?     Describe thermal expansion/contraction. When temperature rises, which one occurs?   I have a 2kg ball on a cliff 10m high. If the gravitational acceleration on this planet is 4m/s2, what is the GPE of the ball?     A 2kg ball is rolled at 3m/s. What is the KE of the ball?   What is work? And what are the units for work? How does this…

A camera weighing 21 N falls from a small drone hovering 34 m overhead and enters free fall. What is the gravitational potential energy change (in J) of the camera from the drone to the ground if you take the following refere (a) the ground being zero gravitational potential energy (b) the drone being zero gravitational potential energy What is the gravitational potential energy (in J) of the camera at the following times if the reference point of zero gravitational potential energy is taken to be a second person looking out of a building 44 m from the ground? (c) before it falls from the drone (d) after the camera lands on the ground

1. A roller-coaster car with a mass of 1200 kg starts at rest from a point 20 m above the ground. At point B, it is 9 m above the ground. [Express your answers in kilojoules (kJ).] a. What is the initial potential energy of the car? b. What is the potential energy at point B? c. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 40 000 J (40 kJ), what is the kinetic energy of the car at point B 2. The time required for one complete cycle of a mass oscillating at the end of a spring is 0.80 s. What is the frequency of oscillation?

A 0.25 kg ball is suspended from a light 1.2 m string as shown. The string makes an angle of 35° with the vertical. Let U = 0 when the ball is at its lowest point (θ = 0). Part A: Draw diagram and label coordinates.  Part B: What is the gravitational potential energy, in joules, of the ball before it is released?  Part C: What will be the speed of the ball, in meters per second, when it reaches the bottom?  Part D: Does replacing the ball by a steel sphere of mass 0.75kg at the end increase the maximum speed?

When plotting a particular kind of energy on a graph, when can we use the equation for the energy (for example, mv² for kinetic energy) to determine the shape of the energy graph? Never, because we have to take into account the other kinds of energy in the system to determine the shape Sometimes, if there are only two kinds of energy in the system Never, because the shape of an energy graph is not related the equation for that kind of energy Sometimes, if the horizontal axis on the graph is labeled with the indicator of the energy type Always, because the shape of a graph always depends on the equation, even if the variables in the equation do not appear on the graph Always, because we are allowed decide where to place y = 0