Emanuel Zacchini, the famous human cannonball of the Ringling Bros. and Barnum and Bailey Circus, was fired out of a cannon with a speed of 24.0 m/s at an angle of 40.0 degrees to the horizontal. If he landed in a net that 56.6 m away at the same height from which he was fired, how long was Zacchini in the air?

Amachine, modeled as a simple spring-mass system, oscillates in simple harmonic motion. its acceleration is measured to have an amplitude of 5,000 mm/s with a fre- quency of 10 hz. compute the maximum displacement the machine undergoes during this oscillation.

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?