You pull on a spring whose spring constant is 20 N/m, and stretch it from its equilibrium length of 0.4 m to a length of 0.9 m. Estimate the work done by dividing the stretching process into two stages and using the average force you exert to calculate work done during each stage. J

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.

Rohit is trying to tune an instrument

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.