3. An athlete pushes against an exercise machine with a force that varies with time according to F(t) = 1200 N (1 – k f), where k = 8 s² Also, the velocity of the athlete's legs acting in the same direction as the force acts according to v(t) = 7 m/s² t a. Create a computer generated plot of the power as a function of time. b. Find the maximum power the athlete generates and the time at which maximum power is generated.

The acceleration of an object is proportional to its velocity O its mass its position its displacement O the net force acting on it

v(m/s) 1.00 6) Draw a velocity-time graph that shows the motion of a ball that roll up then down a ramp with an initial velocity of +1.0 m/s and an acceleration of -0.20 m/s². 15 1.0 t(s)

2:41 .ll ? a docs.google.com answer all questions The number of oscillations completed by simple pendulum in one second is called? * Amplitude Time period Frequency Wavelength Two pendulums of the same length are set up. If one bob is heavier than the other, what is the period of oscillation of the pendulum of the heavier bob? * Remains the same. Greater or same as the lighter bob. Lesser than the lighter bob. Greater than the lighter bob. Relative to its period on the earth, the period a pendulum on the moon(1.625 m/s2) is * The same as on the earth

An automobile reaches 120,000 miles. The dash calculator has never been reset and indicates an overall average speed of 32 ½ mph: How many hours has the engine been running? At a guess, the average rpm of the engine has been 1750. How many revolutions has the engine completed?

Please find the torque

2 Your friend is planning to ride his bike up a ramp and land on the roof of a building as shown below. The building is 6.00 m high and 8.00 m away from the ramp. The ramp is 3.00 m wide and 4.00 m tall. 4.00 m 1 ← 3.00 m 6.00 m 8.00 m A. What is the minimum speed with which your friend needs to leave the ramp in order to land on the building? B. Another friend is going to use his motorized scooter for the same stunt. The maximum speed of the scooter is 15.0 m/s. How close to the building should you move the ramp so that your friend lands on the roof right at the front edge of the building?

Assuming all the value that need for the to find these questions: can pick any value to be able to solve these equations  make assumptions for the unknow value, can pick any value Find the following A) initial potential energy of the system  B) Kinetic energy at the instant of release C) find the mass needed to hurl the 7g clay ball 3 meters

3. For this series of 5 questions, a block is released from the position shown with a certain initial velocity. It then slides down the smooth (friction-less) path for which the function is given in the image. You will be asked to solve for different things. Please pay attention: the numbers may change from problem to problem since they are randomized. 5) If the block has mass of 35 kg and its initial velocity is 2.7 m/s (at x = 3 m), determine the maximum compression of the spring (after the block has pushed in the spring and come to a stop). The spring constant is given in the image. Your answer must include 3 places after the decimal point and the proper unit. Take g = 9.81 m/s². k = 5 kN/m puudu Your Answer: Answer units y = 0.25x². 3 m v X

A hammer has a speed of 8.0 m/s just before it strikes a 0.015 kg iron nail horizontally, using its 1.2 kg head. Assuming the nail absorbs all of the energy from the hammer, how much would the temperature of the nail rise if the hammer hit the nail 8 times in quick succession? Enter your answer in either K or °C. (Since it's a change in temperature, these units are identical.) J kg.K The heat capacity of iron is 450-