Question

Draw the diagram on a neat paper with clear handwriting and solve the problems. Don't forget to draw the diagram!

1.An airplane’s takeoff speed is 320 km/h. If its average accelera-tion is 2.9 m/s2, how much time is it accelerating down the run-way before it lifts off?

2.In a medical X-ray tube, electrons are accelerated to a velocity of 108 m/s and then slammed into a tungsten target. As they stop, the electrons’ rapid acceleration produces X rays. If the time for an electron to stop is on the order of 10-9 s, approximately how far does it move while stopping?

3.A racing car undergoing constant acceleration covers 140 m in 3.6 s. (a) If it’s moving at 53 m/s at the end of this interval, what was its speed at the beginning of the interval? (b) How far did it travel from rest to the end of the 140-m distance?

4.Two divers jump from a 3.00-m platform. One jumps upward at 1.80 m/s, and the second steps off the platform as the first passes it on the way down. (a) What are their speeds as they hit the water? (b) Which hits the water first and by how much?

Answer 1