4. A body travels at a velocity of 8 cm/min. What is its kinetic energy in J/kg?
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- A bowling ball of mass m=2.6 kg drops from a height h = 12 m. A semi-circular tube of radius r = 5.4 m rest centered on a scale. A) Write an expression for the reading of the scale when the bowling ball is at its lowest point, in terms of the variable in the problem statement B) What does the scale read in newtons.Question no. 6 (include free body diagram)Two blocks rest on a frictionless surface as shown. The slope part has an angle of 40◦(A) Draw freebody diagrams for both objects.(B) Write out an equation for the acceleration of the lighter block. Leave all unknowns as letters and put in numerical values for all terms that you can.(C) Write out an equation for the acceleration of the heavier block. Leave all unknowns as letters and put in numerical values for all terms that you can.(D) Would it be possible to solve the system of equations you have written in parts (B) and (C) to find the acceleration? (If you have done everything correctly, it will be possible, but this question is asking about the equations you have written out. If you have done something incorrectly, you can get credit for realizing it.) You do not have to solve this system of equations.
- Jeanine, who has a mass of 45 kg, rode a roller coaster through a loop with a radius of 35 km . Assume the roller coaster maintained a constant speed of 48m/s. Draw a free-body diagram of the scenario below. Include the forces at the: • top • bottom • sidesConsider a 220-g wooden block placed on an 81.0-cm board. Then wooden block then starts to move at a constant speed. A 0.335 N force is needed to make the wooden block continue moving at a constant speed. What is the coefficient of kinetic friction?A contestant in a winter games event pushes a 37.0 kg block of ice across a frozen lake as shown in the figure below. The coefficient of static friction is 0.1 and the coefficient of kinetic friction is 0.03. (For each answer, enter a number.) (a) Calculate the minimum force F (in N) he must exert to get the block moving.
- Two objects with masses of 3.00 kg and 5.00 kg are connected by a light string that passes over a frictionless pulley, as in the figure below. (a) Draw a free-body diagram for each object. Determine (b) the tension in the string, (c) the acceleration of each object, and (d) the distance each object will move in the first second of motion if both objects start from rest.5. Three nondescript boxes are hung from a rope and pulley system. The masses are: M1 = 6 kg, M2 = 3 kg. M3 = 4 kg. Assuming the pulley and ropes are perfect (no mass or friction), we will find the three tensions. a) Let's start by making four free body diagrams: one for each mass and one for the entire system represented as one big mass.A 1000 kg car travels around a circular track at a constant speed. Draw the free-body diagram for the car as viewed from the front of the car. If the radius of the path is 200 m and the car is traveling at 25 m/s, What is the magnitude of the force keeping the car in a circular path? (Give answer to 3 sig figs)
- The 7.4 lb block has a speed of V = 2.4 ft/s to the left when the force of F = (3.6t3) lb is applied to the right. Determine the velocity and position of the block when t = 0.2 sec. The coefficient of kinetic friction at the surface is uy = 0.2. Provide both the Free-Body-Diagram and the Kinetic-Diagram. V F= (3.6t) lbA baseball player of mass 85.0 kg travelling at an initial speed of 7.00 m/s slides along a horizontal playing field before coming to a complete stop after 1.70 s. What is the coefficient of kinetic friction between the player and the field? Answer to three decimal places .At Ted's request, Bill pushes the pizza box across the granite countertop towards Ted. When the box leaves Bill's hand it is sliding at 2.60 m/s. The box comes to rest over a distance of 110 cm. What is the coefficient of kinetic friction, uk, between the pizza box and the countertop? (Ignore air drag.)