1.) The tension in a horizontal string is used to accelerate 34.8kg crate, along a horizontal friction-less surface, at the rate of 0.725m/s^2 for 15.0s. (a) Find the net work done on the crate. (b) What is the average power delivered by the string?

2.)How much work is required to reduce the speed of a 1450 kg car traveling at 126 km/h to 99.0 km/h in 7.50 s? What is the average horsepower of the engines braking system?

Question

1.) The tension in a horizontal string is used to accelerate 34.8kg crate, along a horizontal friction-less surface, at the rate of 0.725m/s^2 for 15.0s. (a) Find the net work done on the crate. (b) What is the average power delivered by the string?

2.)How much work is required to reduce the speed of a 1450 kg car traveling at 126 km/h to 99.0 km/h in 7.50 s? What is the average horsepower of the engines braking system?

anonymous · Answer

Please help with these two questions!!!! I am sooo lost