Answer:
correct answers will be
2. The train is not an inertial frame of reference.
5.The train may be moving at a constant speed in a circle.
8. The train must be accelerating.
Explanation:
As we know that string makes an angle with the horizontal
so we can write the force equation for the given ball
also in Y direction
now we have
now we can conclude that train is accelerating with acceleration same as gravity
now correct answers will be
2. The train is not an inertial frame of reference.
5.The train may be moving at a constant speed in a circle.
8. The train must be accelerating.
Answer:
The rate at which the friction slows down the object is
Step-by-Step Explanation:
Mass of the object = 12 kg
Opposing Force of friction = F = 30 N
The rate at which the friction slows down the object is actually the deceleration produced by that force.
According to Newton's law:
F = ma
So the acceleration/deceleration produced by a Force F on an object of mass m is a, given by:
a = F/m
Hence deceleration produced by friction = a = 30/12
Answer:
Pressure = Density x Gravity acceleration x Height
Density of water = 1000 Kgm^-3
Gravity acceleration = 9.8 ms^-2
So it is 4.50.
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