Answer:
u = 29.22 m/s
Explanation:
distance (s) = 58.52 m
coefficient of kinetic friction (k) = 0.75
final velocity (v) = 0 m/s
acceleration due to gravity (g) = 9.8 m/s^{2}
How fast was she driving (u)
we can get how fast she was driving by using the formula below
s = ut - 
...equation 1
where
- s = distance
- u = her initial velocity
- a = acceleration =
- k = coefficient of kinetic friction
- g = acceleration due to gravity
from v = u - at (recall that v = 0)
0 = u - at, therefore t = u/a = u/kg
now substituting the required values above into equation 1 we have
s = 
s = 
u = 
u = 
u = 29.22 m/s
Answer:
B. 2. A baseball was hit by a bat and now flying through the air.
Explanation: A baseball that is hit by a bat has a larger velocity, due to this the amount of kinetic energy is high.
Physics – branch of science that studies matter and its motion through space and time, along with related concepts such as energy and force. Physics is one of the "fundamental sciences" because the other natural sciences (like biology, geology etc.) deal with systems that seem to obey the laws of physics.
The correct answer to the question is : 
EXPLANATION :
As per the question, the specific heat of gold is given as c = 
The heat given to the gold dQ = 195 J
The mass of the gold is given as m = 15 gram.
We are asked to calculate the change in temperature.
Let the change in temperature is dT.
We know that dQ = mcdT
[ANS]
Hence, the change in temperature is 100 degree celsius.
