How much does the Earth weigh? Why does the moon appear in the daytime?
1 answer:
You might be interested in
Answer:
x=0.46m, speed=7.9m/s
Explanation:
Using the concept of conservation of energy:
1. kinetic energy of mass m and velocity v:
2. gravitational potential energy of mass m, grav. acc. g and height h:
3. potential energy in a spring with spring constant k and displacement from equilibrium x:
Calculating x:
Calculating the speed:
Solving for :
Answer:
(a)
(b)
Explanation:
Parameter given:
Electric field, E =
(a) Electric force is given (in terms of electric field) as a product of electric charge and electric field.
Mathematically:
Electric charge, q, of an electron =
(b) This electrostatic force causes the electron to accelerate with an equivalent force:
F = -ma
where m = mass of an electron
a = acceleration of electron
(Note: the force is negative cos the direction of the force is opposite the direction of the electron)
Therefore:
Mass, m, of an electron =
=>
The acceleration of the electron is