Answer:
1.07 m
Explanation:
x = Compression of the spring
k = Spring constant = 53 N/m
Initial length = 18 cm
P = Kinetic energy
K = Kinetic energy
At the lowest point of the mass the energy conservation is as follows
At its lowest position the mark on the ruler will be
The spring line will end up at 1.07 m
Answer:
Combine to form heavier elements
Explanation:
as opposed to fission which splits heavier atoms into lighter elements.
Answer:
The final velocity is 
Explanation:
From the question we are told that
The mass of the child is 
The initial speed of the child is 
The mass of the wagon is 
The initial speed of the wagon is 
The mass of the ball is 
The initial speed off the ball is 
Generally the initial speed of the system (i.e the child , wagon , ball) is
Generally from the law of linear momentum conservation
Here 
is the momentum of the system before the ball is dropped which is mathematically represented as
=> 
=> 
and
is the momentum of the system after the ball is dropped which is mathematically represented as
=> 
So
=>
Answer: I think it is true.
Explanation: Oxidation occurs when electrons are lost, while reduction occurs when electrons are gained. The two processes are linked, whenever one substance is oxidized another has to be reduced. The sodium ions (Na+) and chloride ions (Cl-) combine to form solid sodium chloride, which is an ionic compound.
Answer:
Explanation:
force of friction = μ mg
= .3 x 62 x 9.8
= 182.28 N
Work done by friction = 182.28 x 4.8
= 874.94 J
Energy loss by skier = 874.94 J
Kinetic energy after he passes the rough patch
= 1/2 x 62 x 6.8² - 874.94
= 1433.44 - 874.94
= 558.5 J
Velocity after crossing the patch v
1/2 x 62 x v² = 558.5
v² = 18
v = 4.2426 m /s
velocity at the bottom
v² = u² + 2gh
= 18 + 2 x 9.8 x 2.5
= 67
v = 8.18 m /s
b ) internal energy generated =
Work done by friction . = 874.94 J
