8. What is the mass of a toy car with a speed of 12.5 m/s and 47500 J of kinetic energy?
1 answer:
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Answer:
a
b
Explanation:
Generally the force of attraction between this two irons is mathematically represented as
Here k is known as the proportionality constant with value
substituting -2 for i.e the charge on oxygen , +1 for
i.e the charge on Lithium and
for r
So
Generally the force of repulsion will be the magnitude but different direction to the force o attraction
So Force of repulsionn is
Answer:
Initial Velocity is 4 m/s
Explanation:
What is acceleration?
It is the change in velocity with respect to time, or the rate of change of velocity.
We can write this as:
Where
a is the acceleration
v is velocity
t is time
is "change in"
For this problem , we are given
a = 1.2
t = 10
Putting into formula, we get:
So, the change in velocity is 12 m/s
The change in velocity can also be written as:
It is given Final Velocity = 16, so we put it into formula and find Initial Velocity. Shown Below:
hence,
Initial Velocity is 4 m/s