Please help me answer the following questions

A bodybuilder lifts a 350 N set of weights from ground level to a position over his head, a vertical distance of 2.00 rn. How much work (in J) does the bodybuilder do? Assume the weights are moved at constant speed. i J Need Help? SERCP1 1 5.1 .P.005. ASK YOUR TEACHER PRACTICE ANOTHER 2. [-/4 Points] Starting from rest, a 4.907kg block slides 1.60 m down a rough 30.0 incline. The coefcient of kinetic friction between the block and the incline is \"k = 0.436. (a) Determine the work done by the force of gravity. J (b) Determine the work done by the friction force between block and incline. J (c) Determine the work done by the normal force. l] (d) Qualitatively, how would the answers change if a shorter ramp at a steeper angle were used to span the same vertical height? 3. [-/4 Points] DETAILS SERCP11 5.1.P.008. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A block of mass m = 2.50 kg is pushed d = 3.00 m along a frictionless horizontal table by a constant applied force of magnitude F = 10.0 N directed at an angle 9 = 25.0" below the horizontal as shown in the gure below. I ldl (a) Determine the work done by the applied force. #1 J (b) Determine the work done by the normal force exerted by the table. J (6) Determine the work done by the force of gravity. l J (d) Determine the work done by the net force on the block. [:1 Need Help? E 4. [-l2 Points] DETAILS SERCP11 5.2.P.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A mechanic pushes a 3.50 x 103-kg car from rest to a speed of v, doing 5,400 J of work in the process. During this time, the car moves 23.0 m. Neglecting friction between car and road, nd v and the horizontal force exerted on the car. (a) the speed v m/s (b) the horizontal force exerted on the car (Enter the magnitude.) :1" 5. [-/2 Points] DETAILS SERCP11 5.2.P.011. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 62.1 kg runner has a speed of 3.70 m/s at one instant during a long-distance event. HINT (a) What is the runner's kinetic energy at this instant (in J)? (b) How much net work (in J) is required to triple her speed? Need Help? Read It Watch It 6. [-/2 Points] DETAILS SERCP11 5.2.P.014. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 55.0 kg cheetah accelerates from rest to its top speed of 30.7 m/s. HINT (a) How much net work (in ]) is required for the cheetah to reach its top speed? J b) One food Calorie equals 4186 J. How many Calories of net work are required for the cheetah to reach its top speed? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the energy that must be produced by the cheetah's body. Cal Need Help? Read It Watch ItWhen a 3.00-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 3.08 cm. (a) What is the force constant of the spring? N/m (b) If the loo-kg object is removed, how far will the spring stretch if a 1.50kg block is hung on it? cm (c) How much work must an external agent do to stretch the same spring 6.50 cm from its unstretched position? J Need Help? 8. [-I1 Points] SERCP11 5.6.0P.033. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A dog with a mass of41.0 kg slides down a wet slope with negligible friction. The dog starts from rest and has a speed of 2.30 m/s at the bottom. What is the height of the slope (in m)? Need Help? _ *1 The figure below shows a box with a mass of m = 5.90 kg that starts from rest at point A and slides on a track with negligible friction' Point A is at a height of ha = 5.30 m A m _;. (a) What is the bnx's speed at point B (in m/s)? m/s What is the bux's speed at point C (in rn/s)? m/s (b) What is the net work (in J) done by the gravitational force on the box as it moves from point A to point C? #1 Need Help? SERCP11 5.6.P.033. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A child and sled With a combined mass of 56.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 2.50 m/s at the bottom, what IS the height of the hill? 10. [/1 Points] | i m Need Help? A model train powered by an electric motor accelerates from rest to 0.660 m/s in 20.0 ms. The total mass of the train is 715 g. What is the average power (in W) delivered to the train by the motor during its acceleration? W Need Help? Read It