What is the gain in gpe when a brick of 2.00 kg is lifted up by 11.5 m

An airplane flying parallel to the ground undergoes two consecutive displacements. the first is 76 km at 39.8◦ west of north, and the second is 156 km at 59.9◦ east of north. what is the magnitude of the plane’s total displacement? answer in units of km. 020 (part 2 of 2) 10.0

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1