2.6kg box is sliding along a frictionless horizontal surface with a speed of 1.8m/s when it encounters a spring.  A. Determine the force constant of the spring if the box compresses the spring 7.50cm before coming to rest. B. Determine the initial speed the box would need to be in order to compress the spring by 1.30cm

A ball is attached to a vertical spring with a spring constant of 6.0 N/m.it is held at the equilibrium position of the spring and then released. it falls 0.40m and then bounce back up again. Calculate the mass of the ball

N 2. A horizontal spring is compressed by 25.0 cm. A 640.0 g box is then placed against the spring and then released. After travelling 3.15 m from the release point, the speed of the mass is 5.68 m/s. The coefficient of friction is 0.34. What is the spring constant of the spring? mi Tum Tm =

I Review I Constants Block A in (Figure 1) has mass 1.00 kg, and block B has mass 3.00 kg. The blocks are forced together, compressing a spring S between them; then the system is released from rest on a level, frictionless surface. The spring, which has negligible mass, is not fastened to either block and drops to the surface after it has expanded. Block B acquires a speed of 1.60 m/s. Part A What is the final speed of block A? Express your answer in meters per second. ΑΣφ V = m/s Figure 1 of 1 Submit Request Answer Part B How much potential energy was stored in the compressed spring? mĄ = 1.00 kg S mg = 3.00 kg Express your answer in joules. Πν ΑΣφ ? U = %3D Submit Request Answer

3. A 60 kg snowboarder begins to slide down the hill 50 m high on a smooth surface with a radius curvature of 80 m. The next section (AB) is a 20 m flat rough track with u = .3, at the end of which there is an elastic barrier with k = 1000 N/m. Find her speed at point A. b. How much work is done by frictional force? c. What is the maximum compression of the spring? d. Find the rate of heat dissipation along the section AB. e. How long does it take to cover the section AB? а. h k В

An object is initially held at rest from a height of 4 m. The object is then released. A. Use conservation of energy to find the velocity right before it hits the ground B. Use the position equation to find the time it takes to reach the ground.

Please help with A & B questions.

1. A block of mass m is pushed against (but not attached to) a spring with stiffness k so that the spring is compressed a distance Ar. When released, the block slides across the frictionless surface of a shelf a height h above the floor, the then falls to the floor. a. What is the speed of the block at the moment it leaves the shelf? V2 = b. What is the speed of the block at the moment just before it hits the ground? Vr =

1. A child's toy uses a spring to launch a 135 g-ball vertically upwards with a time-varying force which starts at t=0 s and lasts 0.25 s. The force is given by F(t)=10N(1-t/0.25s) and is directed straight up. Air drag can be ignored in this problem. A. What is the velocity of the ball after the 0.25 s passes and the ball leaves the launcher? Hint: you need to take gravity into consideration for this problem. B. After the ball leaves the launcher, how high does it get in the air?

A child's toy consists of a piece of plastic attached to a spring in the figure below. The spring is compressed against the floor a distance of 2.00 cm, and the toy is released. If the toy has a mass of 80 g and rises to a maximum height of 50.0 cm, estimate the force constant of the spring. N/m