Answer:
The magnetic force can act from a distance because of the magnetic field that is created around it. It can be defined as imaginary lines around the magnet upto which it has magnetic force.
If a piece of iron is put into the magnetic field but has a slight distance from the magnet, it will be pulled towards the magnet because it is in its magnetic field.
The south pole and the north poles of the magnet has effect on each other. Same poles repeal each other and opposite poles attract each other resulting in forming a field of attraction or repulsion.
The imaginary lines created are known as magnetic field which is responsible for the magnetic force from a distance.
That all depends on the planet toward which the mass is falling.
If this happens to be taking place near the Earth, then the object accelerates
at the rate of about 9.8 meters per second every second.
Furthermore, if there is truly no air resistance, then it makes no difference whether
the object is a feather, a mass of 30 kg, or a school-bus. All objects accelerate at
the same rate regardless of their mass.
Answer:
121km/h
Explanation:
Let speed of boat=xkm/h
Speed of water flow=33 km/h
Speed upstream=(x-33)km/h
Speed downstream=(x+33)km/h
Time=44 hrs
Time =77 hrs
We have to find the speed of boat.
Using the formula
Upstream distance=Downstream distance
Hence, the speed of boat=121km/h