Author Question: The type of energy that a swinging pendulum has at the low point of its swing is A) elastic. B) ... (Read 160 times)

HCHenry · **on:** Jul 29, 2018

The type of energy that a swinging pendulum has at the low point of its swing is

A) elastic.
B) kinetic.
C) gravitational.
D) thermal.
E) sexual.

Question 2

A projectile is fired from ground level with an initial speed of 55.6 m/s at an angle of 41.2 above the horizontal. Neglect air, take upward as the positive direction, and use g = 9.8 m/s2.

(a) Determine the time necessary for the projectile to reach its maximum height. (b) Determine the maximum height reached by the projectile. (c) Determine the horizontal and vertical components of the velocity vector at the maximum height. (d) Determine the horizontal and vertical components of the acceleration vector at the maximum height.

Missbam101 · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

B

Answer to Question 2

(a) 3.7 s (b) 68 m (c) vhorizontal = 42 m/s, vvertical = 0 m/s
(d) ahorizontal = 0 m/s2, avertical = -9.8 m/s2