During a football workout, two linemen are pushing the coach on the sled. The combined mass of the sled and the coach is 349.0 kg. The coefficient of friction between the sled and the grass is 0.860. The sled accelerates at a rate of 0.670 m/s/s. Determine the force applied to the sled by the linemen in newtons. Round to a whole number. (Use g=9.81 m/s2.

Aball is thrown straight up into the air with a speed of 21 m/s. if the ball has a mass of 0.1 kg, how high does the ball go? acceleration due to gravity is g = 9.8 m/s^2. a. 22.5 m b. 20.0 m c. 25.0 m d. 17.5 m

Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency

You have been hired to design a spring-launched roller coaster thatwill carry two passengers per car. the car goes up a 10-m highhill, then descends 15m to the track's lowest point. you'vedetermined that the spring can be compressed a maximum o 2.0m andthat a loaded car will have a maximum mass of 400kg. for safetyreasons, the spring constant should be 10% larger than the minimumneeded for the car to just make it over the top. a) what spring constant (k) should you specify ? b) what is the maximum speed of a 350 kg car if the spring iscompressed the full amount.