Answer:
(a) E = 73.5mJ
(b) v = 2.188 m/s
(c) KE = 55.1 mJ
(d) PE = 18.37mJ
Explanation:
m = mass of the object = 0.03 kg
k = spring constant = 30 N/m
A = amplitude = 0.07 m
For part (a)
The total energy of the system can be found by:
E = k × A² / 2
E = (30 N/m) × (0.07 m)² / 2
E = 0.0735 J
E = 73.5mJ
For part (b)
The elastic potential energy in the spring at position d = 0.0105 m is:
PE = k × d² / 2
PE = (30 N/m) × (0.0105 m)² / 2
PE = 0.00165375 J
The kinetic energy at that point is:
KE = E - PE
KE = (0.0735 - 0.00165375)
KE = 0.07184 J
So its speed is:
KE = m × v² / 2
v = √( 2 × KE / m )
v = √( 2 × (0.07184 J) / (0.03 kg) )
v = 2.188 m/s
For part (d)
The elastic potential energy in the spring at position d = 0.035 m is:
PE = k × d² / 2
PE = (30 N/m) × (0.035 m)² / 2
PE = 0.018375 J
PE = 18.37mJ
For part(c)
The kinetic energy at that point is:
KE = E - PE
KE = (0.0735J) - (0.018375 J)
KE = 0.0551 J
KE = 55.1 mJ
Answer:
gravityis an invisible force that pulls objects toward each other. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass .
Explanation:
According to Newton's first law of motion Force is the external energy that changes or tends the state of rest or of uniform motion of body in straight line .
hope it is helpful to you ☺️
The tactile system is actually made up of two distinct skin senses;
protective and the discriminative system. The function of the protective system
is to alert us to harmful stimuli. The receptors of the system are the hairs of
our skin, head and genitals. The discriminative system is to show us what we
are touching, where on our bodies is touching us and what are touching us. The receptors
for his system are the hands, fingers, soles of feet and mouth and tongue.
<span>Newton established his three laws of motion to understand the motion of objects in a systematic way [ same thing as all Scientists did for human's curiosity ].
His three laws of motion are as follows:
First Law: - </span><span> An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Second Law: - </span><span> The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Third Law: - </span><span>For every action, there is an equal and opposite reaction
Hope this helps!</span>