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? A.)the ground is zero gravitational potential energy B.)the drone being zero gravitational potential energy

An object with a mass of 15kg slides down an incline with a length of 6.0m at an angle of 28 degrees from horizontal.  The coefficient of friction between the object and incline is 0.25  a) How much work does the gravitational force perform on the object? b) How much work does the frictional force perform on the object?  c) What will its speed be as it reaches the bottom of the incline?

Question on Physics - Unit - Work and Energy Which of the following statement correctly describes the relationship between an objectsgravitational potential energy and its height above the ground? A. Proportional to the square of the objects height above the groundB. Directly proportional to the objects height above the groundC. Inversely proportional to the objects height above the groundD. Proportional to the square root of the objects height above the ground

Q 3. Three cars are traveling at 30km/h, 50km/h and 200km/h, respectively. Each speed corresponds to a certain kinetic energy. a)  Note down the expression for the kinetic energy of a moving object with a velocity v. b)  Note down the potential energy for an object lifted up from the ground to height h. c)  Based on a) and b) find an expression for the height as a function of velocity by assuming that the kinetic energy equals the potential energy of the same object. In other words find h(v) from which the object would need to be dropped and calculate the height so it has a speed of 30 km/h, 50 km/h or 200 km/h on impact with the ground. Assume free fall without air resistance d)  Comment on your chances of survival if you are involved in head-on collisions for the three different speeds.