Acannon fires a 0.652 kg shell with initial
velocity vi = 12 m/s in the direction = 61 ◦
above the horizontal.
the shell’s trajectory curves downward be-
cause of gravity, so at the time t = 0.473 s
the shell is below the straight line by some
vertical distance h.
find this distance h in the absence of
air resistance. the acceleration of gravity is
9.8 m/s2 .
answer in units of m

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2

Which of the the following are examples of projectile motion of both projectile motion and two dimensional motion

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%