35° B C X A 2 kg block A is connected to a 4 kg block B by a light inextensible cord that passes over a frictionless pulley of negligible mass at C as shown in Figure 1.1. The mass B is connected to a spring with spring constant of 120 N/m. The spring has an unstretched length of 8 cm. From the unstrecthed position, the block A is pulled 10 cm down the plane, stretching the spring, and then released from rest. Assume that the friction between the block A and the plane, and the mass of the spring are negligible. Determine the speed of the blocks when the spring is again unstrecthed

You are playing a game and you push a cart to give it in. speed. The cart starts at the bottom (zero) of a ramp and after reaching the top of the ramp, the cart travels across a horizontal track w/ friction. The mass of the cart is 44 x 10^-3 kg. The ramp is 56 cm high. The length is 70 cm. What can you infer of the intial speed in (m/s)

A body of mass m starts down from the top of an inclined plane 20 ft long and 10 ft high. What is its velocity at a point 12 ft from the top if coefficient of friction is 0.1? Pls provide the fbd thank you.

Conservation of Energy, Projectile Motion, Acceleration x, y, z. A marble of weight=5lb is launch thanks to a spring on a ramp. The spring has a coefficient of rigidity of = 5lb/ft, an unstretched length of s0=7ft. The ramp is 1=9ft long and h=5ft tall. k www. е VA h Th max Range If the velocity at A is vA=9ft/s find: 1. The displacement of the spring needed to reach this velocity. 2. The range of the flight. 3. The maximum altitude of the flight. с In the box below, enter the maximum altitude of the flight in ft with 2 decimals (Question3).

Two forces act on a 2.55 kg object, the gravitational force and a second, constant force. The object starts from rest and in 1.20 s is displaced (4.05î – 3.30j) m. Write th second force in unit vector notation. (Enter your answer in kg • m/s?. Assume the gravitational force acts in the -j direction.)

Jeff of the Jungle swings on a 7.6-m vine that initially makesan angle of 37° with the vertical. If Jeff starts at rest and has amass of 78 kg, what is the tension in the vine at the lowest pointof the swing?

rough surfice Smath swace leeeeed 2.50m he 3.00m E; Ei + WNc A 34.2 kg block slides with a velocity of 10.22 m/s to the right on a frictionless surface (as shown in the figure above). The block slides up a slope to a height of 3.00 m and then slides across a 2.50 m long rough surface with a coefficient of kinetic friction equal to 0.325. The block continues to travel to the right and bumps into a massless spring with a spring constant (k) equal to 2320 N/m. a) How much does the spring get compressed by the block with respect to its equilibrium length? Please answer with a positive number in units of metres, with 3 sig figs. Start with conservation of energy: E, = E; + WNC , and show all steps. b) What is the potential energy stored by the spring when the mass comes to a stop? Please show the symbolic equation and then "plug in the numbers" to give a numerical answer in units of joules with 3 sig figs. c) What happens to the potential energy stored in the spring after the block stops…

Which of the following is an acceptable unit for kinetic energy? N m ON m m O kg т O kg

A 68-kg runner exerts 180 N of horizontal force as he contacts the ground. The vertical ground reaction force at this time is 1250 N. 105 N of air resistance are working against her motion. What is the direction of the resultant external force relative to the ground?

Let's consider the system given in Figure 2. The end of a flexible spring with spring constant k is attached to the wall and the other end to a block of mass m. There is no friction between the block and the inclined plane. When the spring is at its natural length, the block is first decelerated. The angle of inclination of the inclined plane is given as ß. a) What is the acceleration of the blog when the spring is extended by x?