A 50kg bicyclist (including the bicycle) is pedaling right with a constant speed despite experiencing a 40N drag. Neglect any friction impeding her motion. What is the magnitude of the net force on the bicyclist?
How much force is her pedaling generating?

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.