Answer:
98.12 m
Explanation:
Initial speed(v) = 25.0 m/s
Coefficient of static friction (u) = 0.650
The minimum value of the coefficient of kinetic friction should be the coefficient of static friction.
Kinetic friction is given as
umg = ma (a is the required acceleration)
We then have
a = -ug
= -(0.65*9.8)
= -6.37 m/s^2
The shortest distance d is obtained by
d = (V^2 - v^2)/ 2a
V = 0 m/s (final velocity)
d = (0 - 25^2) / 2(-6.37)
d = -625/-6.37
d = 98.12 m
Answer: Distance doesn't specify direction but displacement do.
Explanation:
Distance specifies how far an object has gone, it doesn't specify direction of the object compared to displacement that is distance covered by a body in a specified direction.
Distance is therefore a scalar quantity i.e quantity that specifies only magnitude but no direction but displacement is vector quantity that specifies both magnitude and direction.
Answer:
The frequency of the standing wave in the second case is higher than that in the first case
Explanation:
The frequency and wavelength of a wave are related.
The moment you sliced the bottle, you've reduced the wavelength of the bottle.
When wavelength decreases, frequency increases and vice versa.
So, When frequency
increases in the second case, more wave crests pass a fixed point each second. That means
the wavelength shortens. So, as frequency increases, wavelength
decreases. The opposite is also true—as frequency decreases,
wavelength increases.
Because "acceleration" doesn't mean "speeding up". It means any change
in the speed or direction of motion.
An airplane speeding up, a bicycle slowing down, and a car going around a curve, are all doing accelerated motion.
A circle has no straight parts, so an object traveling in a circle is always changing
its direction. That means accelerated motion, even if its speed doesn't change..
