A50 kg boy jumps off the front of a 1.5 kg skateboard moving forward. find the skateboard’s velocity immediately after the boy jumps, assuming that the skateboard’s initial velocity is 3.5 m/s and the boy’s velocity when jumping off the front is 5 m/s.

Sara is creating an experiment. her hypothesis states the following. if i increase the air in my tires, then i will get better gas mileage. if this is her hypothesis what column titles do we need in our date table? a. air pressure in tire (psi) and gas mileage (mph) b. air pressure in the atmosphere (psi) and gas mileage (mph) c. miles (m) and gallons per mile (g) d. old battery and new battery

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?