This direct relationship graph shows that the position of the car as time elapses.
1 answer:
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Answer:
a) F = 2.25 10³ N, b) REPULSIVE.
Explanation:
a) The electric force is given by coulomb's law
F = k q1q2 / r2
in this case nso indicate that the two charges have the same value
q₁ = q₂ = 2.5 10⁻⁶ C
Let's reduce the magnitudes to the SI system
r = 0.5 cm (1m / 100cm) = 5 10⁻³ m
let's calculate
F =
F = 2.25 10³ N
b) In electricity, electric charges of the same sign repel and those of the opposite sign attract
In this exercise, the balls are equal and are rubbed with the same material, for which it acquires charges of the same type, consequently, as the charges are of the same type, they indicate that the negative force is REPULSIVE.
Answer: 2.63 m/s
Explanation:
The question in english is written below:
During an attemp of croquet game, a 0.52 kg ball at rest on the grass is hit by a mallet with an average force of 190 N, if the mallet is in contact with the ball for , Whay is the speed of the ball just after being hit?
According to Newton's second law of motion, the force exerted on an object is directly proportional to its mass
and acceleration
:
(1)
On the other hand, acceleration is defined as the variation of velocity in time
:
(2)
Substituting (2) in (1):
(3)
Where:
Isolating the velocity from (3):
(4)
Finally: