Answer:
Explanation:
We start by calculating the speed of the egg when it touches the upper surface of the carpet. This can be done by using the law of conservation of energy: in fact, the initial gravitational potential energy of the egg is converted into kinetic energy at the moment of impact, so we can write
where
m is the mass of the egg
is the acceleration of gravity
h = 0.35 m is the initial height of the egg
v is the speed as it touches the carpet
Solving for v,
Now we analyze the motion of the egg through the carpet. The minimum acceleration will be obtained when the egg cover the whole tickness of the carpet to stop, that is
s = 3.0 cm = 0.03 m
And the egg must stop after covering this distance, so the final velocity will be
v' = 0
To find the acceleration, we can use the suvat equation:
and solving for a,
Answer:
F = 120 N
Explanation:
Given that,
The mass of a runner, m = 60 kg
Acceleration of the runner, a = 2 m/s²
We need to find the force provided from her legs. The formula for force is given by :
F = ma
Substitute all the values,
F = 60 kg × 2 m/s²
= 120 N
So, the required force is equal to 120 N.
Answer:
Raising its temperature by
Explanation:
The specific heat capacity of a substance is defined as the amount of energy needed to raise the temperature of 1 kg of a substance by .
The specific heat capacity of a substance essentially tells us how much energy is needed to heat the substance: the larger it is, the more energy is needed. The amount of energy needed to increase the temperature of a substance is given by
where
m is the mass of the substance
Cs is the specific heat capacity
is the temperature variation of the substance
Answer:
Solution:
As per the question:
Mass of first object, m = 120 kg
Mass of second object, m' = 420 kg
Mass of the third object, M = 69.0 kg
Distance between the m and m', d = 0.380 m
Now,
To calculate the gravitational force on the object of mass, M placed mid-way due to mass, m:
To calculate the gravitational force on the object of mass, M placed mid-way due to mass, m':
To calculate the gravitational force on the object of mass, M placed mid-way due to mass, m and m':
Answer:
The principle of a potentiometer is that the potential dropped across a segment of a wire of uniform cross-section carrying a constant current is directly proportional to its length. The potentiometer is a simple device used to measure the electrical potentials (or compare the e.m.f of a cell).
Explanation:
I hope it will help you