Answer:
A. 216.36 
B. 96.56
Explanation:
Let 
be the distance in first part.
= velocity × time
= 85 × 
= 49.58 km
Let 
be the distance in first part.
= 130 km
Average velocity = 
When second leg of the trip is
A. Toward north
Average velocity = ![\frac{[tex] s_{1} + s_{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5Btex%5D%20s_%7B1%7D%20%2B%20s_%7B2%7D%20%20%20)
}{Total time} [/tex]
Average velocity = 
Average velocity =216.36
B. Toward south
Average velocity = ![\frac{[tex] s_{1} - s_{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5Btex%5D%20s_%7B1%7D%20-%20s_%7B2%7D%20%20%20)
}{Total time} [/tex]
Average velocity = 
Average velocity =96.56
Answer:
hope this helps you :)
Explanation:
An object is in motion if its position changes relative to another object. To decide if you are moving, you can use your chair as a reference point. A reference point is a place or object used for comparison to determine if something is in motion.
Newton's law of conservation states that energy of an isolated system remains a constant. It can neither be created nor destroyed but can be transformed from one form to the other.
Implying the above law of conservation of energy in the case of pendulum we can conclude that at the bottom of the swing the entire potential energy gets converted to kinetic energy. Also the potential energy is zero at this point.
Mathematically also potential energy is represented as
Potential energy= mgh
Where m is the mass of the pendulum.
g is the acceleration due to gravity
h is the height from the bottom z the ground.
At the bottom of the swing,the height is zero, hence the potential energy is also zero.
The kinetic energy is represented mathematically as
Kinetic energy= 1/2 mv^2
Where m is the mass of the pendulum
v is the velocity of the pendulum
At the bottom the pendulum has the maximum velocity. Hence the kinetic energy is maximum at the bottom.
Also as it has been mentioned energy can neither be created nor destroyed hence the entire potential energy is converted to kinetic energy at the bottom and would be equivalent to 895 J.
No, if it takes less time, the acceleration is greater.
Hope this helps!
