Answer:
True, the total amount of mechanical energy is merely the sum of the potential energy and the kinetic energy. This sum is simply referred to as the total mechanical energy.
Explanation: Hope it helps you:))))
have a good day
 
        
             
        
        
        
Answer:
(a): the mug hits the floor 0.752m away from the end of the bar.
(b): the speed of the mug at impact are:
V= 4.87 m/s
direction= 70.82º below the horizontal.
Explanation:
Vx= 1.6 m/s
Vy=?
h= 1.1 m
g= 9.8 m/s²
t is the fall time

t=0.47 sec
Vy= g*t
Vy= 4.6 m/s

V= 4.87 m/s
α= tan⁻¹(Vy/Vx)
α= -70.82º
 
        
                    
             
        
        
        
Answer:
Convert all the times to either hours or seconds
Explanation:
One time unit is in hours, and the other is in seconds.  In order to do the math, the units need to be the same.  So you either need to convert hours to seconds, or seconds to hours.
 
        
                    
             
        
        
        
<span>Three-fourths of the illuminated side of the moon be visible 
from Earth when the moon is at position-B.  (choice-B)
Notice the particularly egregious screw-up on the drawing at the
"Third Quarter" position.  There, the drawing shows the illuminated 
side of the moon AWAY from the sun, and the dark side of the moon 
TOWARD the sun.  That's about as silly as you can get.  </span>
        
                    
             
        
        
        
Answer:
121km/h
Explanation:
Let speed of boat=xkm/h
Speed of water flow=33 km/h
Speed upstream=(x-33)km/h
Speed downstream=(x+33)km/h
Time=44 hrs
Time =77 hrs
We have to find the speed of boat.

Using the formula 
Upstream distance=Downstream distance





Hence, the speed of boat=121km/h