A 52 kg sprinter, starting from rest, runs 60 m in 7.1 s with a constant acceleration.
How much work does the sprinter do during the final 2.0 s of his run?
What is the sprinter's average power output during the final 2.0 s ?
A 52 kg sprinter, starting from rest, runs 60 m in 7.1 s with a constant...
A 53 kg sprinter, starting from rest, runs a 60 m long race in 7.2 s with a constant acceleration. Part A How much work does the sprinter do during the first 2.5 s of the race? Express your answer to three significant figures and include the appropriate units. Part B What is the sprinter's average power output during the first 2.5 s of the race? Express your answer to three significant figures and include the appropriate units. Part C How...
A typical male sprinter can maintain his maximum acceleration for 2.0 s and his maximum speed is 10m/s . After reaching this maximum speed, his acceleration becomes zero and then he runs at constant speed. Assume that his acceleration is constant during the first 2.0 s of the race, that he starts from rest, and that he runs in a straight line. How far has the sprinter run when he reaches his maximum speed? What is the magnitude of his...
An 8.3 kg crate is pulled 5.1 m up a 30 degree incline by a rope angled 19 degree above the incline. The tension in the rope is 100 N and the crate's coefficient of kinetic friction on the incline is 0.23. How much work is done by tension, by gravity, and by the normal force? Express your answers using two significant figures. Enter your answers numerically separated by commas. What is the increase in thermal energy of the crate...
Item 17 A sprinter runs a 100 m dash in 12.0 s. She starts from rest with a constant acceleration ay for 2.6 s and then runs with constant speed for the remainder of the race. Part A What is the value of ar? Express your answer with the appropriate units. μΑ ? ay = Value Units Submit Request Answer
A biker runs at constant speed 34 m/s around a circular track with a centripetal acceleration of magnitude 12.5 m/s^2 a) what is track's radius ? b) what is the magnitude of angular velocity of the sprinter? c) what is the magnitude of the sprinter's angular acceleration? d) how long does it take to complete one revolution this time is called "period of motion"? e) how many revolutions per minute does the sprinter make?
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 760-kg helicopter rises from rest to a speed of 10.0 m/s in a time of 5.0 s. During this time it climbs to a height of 8.9 m. What is the average power generated by the lifting force? Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average...
A 639-kg elevator starts from rest and moves upward for 3.40 s with constant acceleration until it reaches its cruising speed, 1.78 m/s. (a) What is the average power of the elevator motor during this period? (b) How does this amount of power compare with its power during an upright trip with constant speed?
Starting from rest, the boy runs outward in the radial direction from the center of the platform with a constant acceleration of 0.5 m/s2. If the platform is rotating at a constant rate theta = 0.2 rad/s, determine the radial and transverse components of the velocity and acceleration of the boy when t = 3 s. Neglect his size.
A 612-kg elevator starts from rest and moves upward for 4.50 s with constant acceleration until it reaches its cruising speed, 1.64 m/s. (a) What is the average power of the elevator motor during this period? hp (b) How does this amount of power compare with its power during an upward trip with constant speed? (Give the power during an upward trip with constant speed.) hp
A 500 kg elevator starts from rest. It moves upward for 2.50 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. a.) What is the average power of the elevator motor during this period? b.) How does this power compare with the motor power when the elevator moves at its cruising speed?