Conservation of Energy

Conservation of Energy Principles

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Title
The graph below shows the external force applied to a 15-kg object throughout a displacement of 8 m.- How much work was done on the object throughout the 8-m displacement?- If the object was initially moving at 4.0 m/s (before the force was applied), calc
Two blocks are connected by a rope as shown on the right. Block m2 with mass of 2.5 kg hangs freely from the rope. Block m1 with mass of 1.5 kg is connected to the other end of the rope, and is on a rough surface with coefficient of friction of 0.2. It is
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
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 object has 50 J of gravitational potential energy when it is 10 m off the ground. How much kinetic energy will a twice-as-massive object have if it is held 20 m off the ground?
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
As shown on the right, a block of mass 7.2 kg is connected through a pulley, to a spring with spring constant 28 N/m. Initially, the mass is held at a level which leaves the spring unstretched. How far down will m go when released?

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