Aperson kicks a ball, giving it an initial velocity of 20.0 m/s up a wooden ramp. when the ball reaches the top, it becomes airborne. the ramp makes an angle of 22.0º to the ground, and the ball travels a distance of 5.00 m on the ramp. what is the maximum height the ball reaches, above the point where it was kicked, if (a) the ramp is frictionless and (b) there is a coefficient of friction of 0.150 between the ramp and the ball?

(a) Height is 4.47 m

(b) Height is 4.37 m

Solution:

As per the question:

Initial velocity of teh ball,

Angle made by the ramp,

Distance traveled by the ball on the ramp, d = 5.00 m

Now,

(a) At any point on the projectile before attaining maximum height, the velocity can be given by the eqn-3 of motion:

where

H =

g =

= 19.06 m/s

Now, maximum height attained is given by:

Height from the ground =

(b) now, considering the coefficient of friction bhetween ramp and the ball, :

velocity can be given by the eqn-3 of motion:

= 18.7 m/s

Now, maximum height attained is given by:

Height from the ground =

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

increases it