Answer:A) he needs to find the net force acting on an object in a direction.
Explanation:
<span>The rate at which energy is transferred is called "power."</span>
Answer: 2.3m/s
Explanation:
mass-energy balance: ke(f) + pe(f) = ke(o) + pe(o)
since we are looking for the point at the bottom of the pendulum, thats the reference point, the lowest in the system. pe(f) is 0, since h
ke(f)=0.5m x v(f)^2
pe(f)=0
ke(o)=0.5m x v(o)^2
pe(o)-mxgxh
find h by: drawing a triangle with the pendulum at the vertical, then displaced by 25 degrees , The difference in height is h, because cos(25)=(adj)/(hyp)=(2-h)/2. I found h=0.187m
In the m-e balance, cancel the masses in all the terms.
.5xv(f)^2 =0.5v(o)^2 +gxh
Given v(o) = 1.2 m/s and g = 9.8 then v(f) = 2.2595 m/s
Therefore V(0) = 2.3 m/s
Answer
given,
Galileo's pulse rate = 75 beats per minutes
Beats per second
1 minutes = 60 s
pulse rate = 
= 1.25 beats/s
times in second
t = 0.8 s/pulse
distance of the object
initial velocity = 0 m/s
s = 3.14 m
distance in feet
1 m = 3.28 ft
3.14 m = 3.14 x 3.28 ft
= 10.3 ft
distance in feet is equal to 10.3 ft.
Answer:
(a) Negative
(b) Positive
Explanation:
Here is a question on sign.
(a) When the rock is going up, it is working against gravity. In this case, the acceleration due to gravity will take a negative value. This is because gravity works or acts downwards
(b) When the rock is coming down, it is actually working with gravity. So in this case, the sign will ne positive
