Waves transfer energy but not matter
Answer:
Explanation:
Given mg = 4N .
m = 4 / g
At the bottom of the swing let centripetal acceleration be a
T - mg = ma
9 - 4 = ma
5 = 4 a / g
a = 5g / 4
Answer:
v = 0.84 m/s
Explanation:
given,
R = 12 cm
M (mass of pulley )= 520 g
m (mass of block)= 20 g
s = 50 cm = 0.5 m
using conservation of energy
Potential energy = Kinetic energy

and v = r ω





v = √0.7
v = 0.84 m/s
During summer months, your ceiling fan blades should be set to spin counterclockwise. When your ceiling fan spins quickly in this direction, it pushes air down and creates a cool breeze.