The coefficient of friction between the block of mass m₁ = 3.00 kg and the surface in the figure below is = 0.280. The system starts from rest. What is the speed of the ball of mass m₂ = 5.00 kg when it has fallen a distance h 1.30 m? m/s m₂ Ⓡ

If a 9.413 kg model airplane is flying [E] with a kinetic energy of 312.4 J. What is its velocity? 46.94 m/s [E] 8.14716 m/s [E] 46.94 m/s [W] O 8.147 m/s [E]

Two masses are pressed against opposite ends of a spring, with one mass at either end of the spring. The spring is has a spring constant of 181 N/m and the two 0.200 kg masses are identical to each other. Pressing the masses against the ends of the spring compresses the spring 21.5 cm from its normal length. If both masses rest on a frictionless, horizontal table, find the speed of each mass in SI units when it has moved free of the spring on the table.

How does kinetic energy depend on velocity?     The kinetic energy is an absolute quantity, the same seen by any observer, moving or stationary.     The kinetic energy seen in my reference frame depends on the velocity squared as I would measure it.     The kinetic energy increases in proportion to the velocity, so if the velocity doubles the energy doubles.     The kinetic energy is zero unless there is an applied force.

Consult Conceptual Example 9 in preparation for this problem. The drawing shows a person who, starting from rest at the top of a cliff, swings down at the end of a rope, releases it, and falls into the water below. There are two paths by which the person can enter the water. Suppose he enters the water at a speed of 18.5 m/s via path 1. How fast is he moving on path 2 when he releases the rope at a height of 2.68 m above the water? Ignore the effects of air resistance. Path 2 and put Path 1

A block of mass 11.0 kg slides from rest down a frictionless 36.0° incline and is stopped by a strong spring with  k = 2.30 ✕ 104 N/m.  The block slides 3.00 m from the point of release to the point where it comes to rest against the spring. When the block comes to rest, how far has the spring been compressed?

A block is dropped onto a spring with k = 34 N////m. The block has a speed of 3.0 m/s just before it strikes the spring. If the spring compresses an amount 0.14 m before bringing the block to rest, what is the mass of the block? Answer in kg.

A particle of mass m is subject to a conservatives force F= A/x1 where a is a constant. The particle is initially at rest at the origin and is given a slight nudge in the positive x direction. The speed of the particle as a function of x is a. 3m 3 V m a 2V 3m x0.75 2m 3a

An object of mass m= 7.6 kg is free to move on a horizontal surface without any friction. It is initially at rest and starts moving under a net force of F =(3N)î +(4N)ĵ . What is the object's speed in m/s after moving 1 meter?

OA: 3 m/s B. 4 m/s OC. 5 m/s 60 N 50 kg A 50 kg cart is at rest when a 60 N force is applied, moving the cart 8 m until it hits an uncompressed spring. It then travels for another 2 m under the action of the force. The mass's velocity after moving 10 m is most nearly OD, 6 m/s 10 m 2 m llll k = 100 N/m