Problem 2.841 Cars A and B are traveling at V 72 mph and va 67 mph, respectively, when the driver of car B applies the brakes abruptly, causing the car to slide to a stop. The driver of car A takes 1.5s to react to the situation and applies the brakes in turn, causing car A to slide as well. If A and B slide with equal accelerations, i.e., SA = -g, where p = 0.83 is the kinetic friction coefficient and g is the acceleration of gravity, compute the minimum distance ď between A and B at the time B starts sliding to avoid a collision.

Q3. One ball of mass m = 0.7 kg is being swung in the vertical, circular path with radius of r = 2.3 m. At the instant shown, the ball is moving at a speed of v = 5.8 m/s. Determine the tension force in the cable OA. Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point, and proper Sl unit. Take g = 9.81 m/s². Your Answer: Answer A 45° units

R ft Rft P lb The block of weight 131 lb is pushed with a force of P = 46 lb on top of two cylindrical rollers with a weight of 32 lb and a radius of R = 1.91 ft. Determine the block's speed after it has been moved 1.48 ft to the left. The block is originally at rest. No slipping occurs. Calculate your answer to two decimal places. Report your answer in ft/s.

I Review | Constants Calculate the work done on the block by the spring as the block falls an arbitrary distance z. Express your answer in terms of the variables a, m, x, and the acceleration due to gravity g, if needed. Consider a hanging spring of negligible mass that does not obey Hooke's law. When the spring is pulled downward by a distance r, the spring exerts an upward force of magnitude ar, where a is a positive constant. Initially the hanging spring is relaxed (not extended). We then attach a block of mass m to the spring and release the block. The block stretches the spring as it falls (Figure 1). (a) How fast is the block moving when it has fallen a distance z, ? (b) At what rate does the spring do work on the block at this point? (c) Find • View Available Hint(s) the maximum distance rz that the spring stretches. (d) Will the block remain at the point found in part (c)? W. Vspring = Submit Part D Calculate the work done on the block by any other forces as the block falls an…

A particle of mass 2 kg moves in a curved path. At a particular instant, it has tangential acceleration of 3 ms-2 and normal  (i.e. radial) acceleration of 4 ms-2. Which of the following is the correct magnitude of force acting on it ?

answer is shown, please provide steps

2. A block travels past point A with a speed of 8 m/s along a smooth surface until it reaches a rough surface of length L=20 m and a coefficient of kinetic friction of 0.8. If the height h₁ = 8 m, and h₂ = 3 m. Determine (A) the speed of the block at point B (B) whether the speed at point C (C) reaches point D. If so, what is the speed at point D, if not, how far is the rough surface that cross the beam?