Answer: Speed can equal to velocity, even though they have different formulas.
Explanation: Speed is the rate at which an object covers distance or how much space the object passed, which is usually measured in miles, meters, or kilometers. Velocity is the rate at which the position changes. Therefore, speed is and can equal to velocity.
<u>Formulas:</u>
Speed = distance/change in time
Velocity = change in distance/ change in time
Answer:
Gravity Increases - Mass increases, distance decreases
Gravity Decreaes - Mass decreases, distance increases
<u>Substance</u><u>:</u><u>-</u>
- A substance is matter which has a specific composition and specific properties.
Answer:
5026.55 m/s
Explanation:
Gravitation potential of a body in orbit from the center of the earth is given as
Pg = -GM/R
Where G is the gravitational constant 6.67x10^-11 N-m^2kg^-2
M is the mass of the earth = 5.98x10^24 kg
R is the distance from that point to the center of the earth = r + Re
r is the distance above earth surface, Re is the earth's radius.
R = 1610 km + 6370 km = 7980 km
Pg = -(6.67x10^-11 x 5.98x10^24)/7980x10^3
Pg = -49983208.02 J/kg
The negative sign means that the gravitational potential is higher away from earth than it is at the earth's surface (it shows convention).
This indicates the kinetic energy per kilogram that the chest of jewel will fall with to earth.
Gravitation Potential on earth's surface is
Pg = -GM/Re
= -(6.67x10^-11 x 5.98x10^24)/6370x10^3 = -62616326.53 J/kg
Difference in gravity potential = -49983208.02 - (-62616326.53)
= 12633118.51 J/kg
The velocity V of the jewel chest will be
0.5v^2 = 12633118.51
V^2 = 25266237.02
V = 5026.55 m/s
Answer:
The spring constant is
Explanation:
Given that,
length = 500 mm
Diameter = 2 cm
Young's modulus = 17.4 GPa
We need to calculate the young's modulus
Using formula of young's modulus
....(I)
From hook's law
....(II)
Put the value of F in equation
We need to calculate the spring constant
....(II)
We need to calculate the area of cylinder
Using formula of area of cylinder
Put the value into the formula
Put the value of A in (II)
Hence, The spring constant is