a

answer b please

For the conical pendulum shown below, the bob moves in a horizontalcircle of radius 0.1 m, at a constant speed v. The mass of the bob is 81 g. The cord sweeps a cone that makes an angle 31.5 o with respect to the vertical. The x and y axes are shown in the figure with positive x pointing towards the center of the circle and positive y pointing upwards. c) Calculate the tension T in the string. d) Calculate the speed v of the bob.

In a TV commercial pickup truck B of mass mB lifts large crate A of mass mA toawrd the top of a cliff by means of a cable and a frictionless pulley. The truck uses constant thrust force F to do the job and accerates forward starting from rest, There are no friction forces except the thrust force F.  a) Determine a symbolic formula for the magnitude of the acceration experienced by the crate. The final formula should not include the unknown tension force.  b) explain whether the cable tension must be greater than, equal to, or less than the crate weight.  c) for mass mA= 1500 kg, mb=2800 kg, and F=18,000N, how far will the crate rise in the first 3.5 s of motion?

answer c please

On 24 November 2021 the DART (Double Asteroid Redirection Test) spacecraft was launched. Its mission is to assess the ability of an impact to deflect the path of an asteroid. DART was launched on a Falcon 9 rocket. At launch a Falcon rocket has a mass of 555 000 kg and generates a force of 7.6 x 106 N. A. Neglecting the effect of gravity, what is the initial acceleration of the rocket? Give your answer to an appropriate number of significant figures. B. Assuming that the initial acceleration remains constant, how fast will the rocket be moving after 2 seconds? C. In practice, as the rocket burns fuel, its mass decreases. Assuming the thrust remains the same, how would your answer to part (ii) change? Would the speed after 2 seconds be lower, the same or higher?

Two masses, m, = 2.16 kg and m, = 9.71 kg are on a horizontal frictionless surface and they are connected together with a rope as shown in the figure. The rope will snap if the tension in it exceeds 50.0 N. What is the maximum value of the force F which can be applied? Submit Answer Tries 0/10 What is the acceleration of the whole system, when this maximum force is applied? 4.212m/s 2 Submit Answer Incorrect. Tries 1/10 Previous Tries

A 2.00-kg object B is connected with a string to a 3.00-kgobject A, which is connected with a second string over a massless, frictionless pulley to a 8.00-kg object C. The strings have negligible mass and do not stretch, and the level tabletop is frictionless.   Calculate the tension ?1. ?1=   N Calculate the tension ?2. ?2=   N Calculate the acceleration ? of the system. ?=   m/s2

A 2.0 kg box is at rest on a flat horizontal surface. A continuously applied force is then exertedon the box. When the applied force just exceeds 5.0N the box then begins to move. Q1. Construct a free-body diagram for the box at the moment when the applied force is 5.0N.     Q2. Determine the magnitude of the peak static friction force and the corresponding coefficientof static friction.

(a) Two objects connected by a light string that passes over a frictionless pulley. (b) Force diagrams for the objects. GOAL Use both the general method and the system approach to solve a connected two-body problem involving gravity and friction.PROBLEM   (a)   A block with mass m1 = 4.00 kg and a ball with mass m2 = 7.00 kg are connected by a light string that passes over a frictionless pulley, as shown in figure (a). The coefficient of kinetic friction between the block and the surface is 0.300. Find the acceleration of the two objects and the tension in the string.   (b)   Check the answer for the acceleration by using the system approach.STRATEGY Connected objects are handled by applying Newton's second law separately to each object. The force diagrams for the block and the ball are shown in figure (b), with the +x-direction to the right and the +y-direction upwards. The magnitude of the acceleration for both objects has the same value, |a1| = |a2| = a. The block with mass m1…