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Conservation of Energy

Conservation of Energy

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A block of mass 2.2 kg can slide along a curved track as shown on the right. The block, initially at a height of 5.6 m above the ground is released. It slides down a track which is all frictionless, except for a rough zone having a length of 0.56 m. In th
A yo-yo of radius 2.8 cm is held so that its centre is 1.2 m above the ground. It is released and dropped. When it is 0.30 m above the ground, it stops falling, then quickly rises back up in the air. What is the rotational velocity of the yo-yo at its low
A pendulum, made of a mass 5.5 kg, is tied to the end of a string of length 60 cm as shown in the figure to the right. This position is called the “equilibrium” or “relaxed” position of the pendulum. If pulled and released, the pendulum can swing freely f
Two 500-g air cars are on a frictionless track. Car A is moving at 0.2 m/swhen it collides into Car B, which is at rest. Both cars move away at0.1 m/s. Compared to the total energy of the system before the collision, what percentage of energy is transferr
A 0.75 kg block is held at rest against a spring compressing it 27.0 cm. The spring constant is 735 N/m. The block is released and it begins to move toward a loop across a frictionless surface. How much kinetic energy does the block have when the spring i
An 800.0-kg car is traveling along a wet road at a velocity of 25.5 m/s. A 1000.0-kg car is traveling along the same road in the same direction at 34.7 m/s. The two cars collide and lock together. Answer the following questions.
A ballistic pendulum apparatus is set up. A bullet is fired at 125 m/s into a 1.5 kg block of ballistic gel. The bullet is embedded in the gel, and together the gel and the bullet rise 0.010 m into the air. What is the mass of the bullet?