False. this is just a physical change, not a chemical change.
When you set a heavy bag down on the ground, you are doing negative work on it.
I think you go to my school!
Answer:
Check Explanation.
Explanation:
For a simple pendulum, the period is given as
T = 2π√(L/g)
It is also given as
T = 2π√(m/k)
where
T = period of oscillation
m = mass of the pendulum
L = length
g = acceleration due to gravity
k = force constant
Equating this two equations,
2π√(L/g) = 2π√(m/k)
(L/g) = (m/k)
(m/L) = (k/g)
So, any pendulum that will have the same period as our pendulum with mass, m, and length, L, must have the ratio of (L/g) to be the same as the pendulum under consideration and the ratio of its mass to force constant (m/k) must also be equal to this ratio.
Hope this Helps!!!
Answer:
(a) 10 s
(b) 236.5 m
(c) Kathy's speed = 47.3 m/s
Stan's speed = 42.9 m/s
Explanation:
<u>Given:</u>
= initial speed of Kathy = 0 m/s
= initial speed of Stan = 0 m/s
= acceleration of Kathy = 
= acceleration of Stan = 
<u>Assumptions:</u>
= final speed of Kathy when see catches Stan
= final speed of Stan when Kathy catches him
= distance traveled by Kathy to catch Stan
= distance traveled by Stan when Kathy catches him
= time taken by Kathy to catch Stan = 
= time interval in which Kathy catches Stan = 
Part (a):
Kathy will catch Stan only if the distances traveled by each of them are equal at the same instant.

Hence, Kathy catches Stan after 11 s from the Stan's starting times.
Part (b):
Distance traveled by Kathy to catch Stan will be distance the distance traveled by her in 10 s.

Hence, Kathy traveled a distance of 236.5 m to overtake Stan.
Part (c):

The speed of Kathy at the instant she catches Stan is 47.3 m/s.

The speed of Stan at the instant Kathy catches him is 42.9 m/s.