Concaved lenses...........
Answer:
The gplanet is 0.193 m/s^2
Explanation:
The speed of the pulse is:


where
m=mass of the wire=4 g= 4x10^-3 kg
M=mass of the object= 3 kg
Replacing values:

Answer:
the greater the height of an object the *greater* its gravitational potential energy
greater
Since the acceleration of car is uniform so the distance traveled by car while brakes are applied is given by

given that



now plug in all data in above formula


so car will cover 14.4 m distance while it apply brakes