Car A and Car B are driving towards each other. Car A's speedometer shows that it is going 60 mph. Car B's speedometer shows that it is going 70 mph. How fast is Car A going relative to a passenger in Car B?
Select one
-130 mph
-60 mph
-70 mph
-10 mph

Describe uniform velocity and variable velocity in short

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?