5 points A sled and its rider has a mass of 125kg. The rider wants you to pull the
sled across a park. An applied force by you and of 190N (Fapp) is applied
to the sled and rider. The sled and rider accelerate at a rate of 1.5m/s2.
Calculate the sliding friction (Ff) between the sled and rider and the snow.

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?