a 1 kg object is moving at 10 m/s. to double its kinetic energy, its speed...
11. The kinetic energy of an 80-kg object moving at 10 m/s is 2000 J 4000 J 6000 J 100 J 1000 J 12. The kilowatt-hour is a unit of speed power force momentum energy 13. Energy sources used today (in the U.S.) are, mostly, from: hydroelectric dams solar panels nuclear power stations geothermal sources fossil fuels 14. What is the velocity of a 30-kg box with a kinetic energy of 6,000 J? 64 m/s 6.0 m/s 18 m/s 20...
A 1 kg object is moving with a speed of 1.80 m/s in the x direction when it passes the origin, as shown in the figure below. It is acted on by a single force Fx that varies with x. (a) What is the work done by the force from x = 0 to x = 2 m? (Note: You will not be able to calculate the answer directly, but there is a way to estimate it!) J (b) What...
do all please. 1. A 20 Kg cart moving at 10 m/s collides with a 10 Kg cart moving at 20 m/ s. The two carts stick to each other after the collision. Calculate the final speed of the carts just after the collision if () They were moving in the same direction direction (i.e. thefaster bumped the slower from behind) (ii) They were moving at 90° respect to each other. (ii) They were moving at 30° respect to each...
26. An object of mass 4 kg moving with a speed of 25 m/s to the right collides with an object of mass 5 kg at rest. If the collision is completely inelastic, calculate the kinetic energy lost during the collision. (1 point) A. 0-375.524 J B. -1056.849 J C. -1285.67 J D. -694.444 J E. -479.985 J
An object has a kinetic energy of 284 J and a momentum of magnitude 23.5 kg · m/s. (a) Find the speed of the object. m/s (b) Find the mass of the object. kg
At a particular instant, a moving object has a kinetic energy of 312 ) and a momentum of magnitude 26.8 kg. m/s. (a) What is the speed (in m/s) of the object at this instant? m/s (b) What is the mass (in kg) of the object at this instant? kg
An object of mass 0.9 kg has a speed of 4.2 m/s at position 1 and a kinetic energy of 14.2 J at position 2. Calculate its kinetic energy at position 1, its speed at position 2, and the total work done on the object as it moves from position 1 to position 2. (a) its kinetic energy at position 1 _________J (b) its speed at position 2 __________m/s (c) the total work done on the object as it moves...
An 4.7-kg object moving at 12.2 m/s catches up and collides with an 22.3-kg object moving at 2.1 m/s in the same direction. After the collision the 4.7-kg object is observed to be moving in the opposite direction with the speed of 2.6 m/s. How much kinetic energy was lost in this system?
11. An object has kinetic energy of 196 J. If its speed is 7 m/s, what is its mass? A) 8 B) 56 C) 21.16601 D) 4.8
(1) A moving object has a kinetic energy of 119 J and a momentum with magnitude of 28.0 kg·m/s. (a) Determine the mass of the object. ______ kg (b) Determine the speed of the object. ______m/s (2) A 5.1 g dart is fired into a block of wood with a mass of 24.2 g. The wood block is initially at rest on a 1.6 m tall post. After the collision, the wood block and dart land 3.4 m from the...