Answer:
.
Explanation:
When an object travel at a speed of in a circle of radius
, the (centripetal) acceleration of that object would be
.
In this question, the ball is travelling at in a circle of radius
. The (centripetal) acceleration of this ball would be:
.
By Newton's Laws of Motion, for an object of mass , if the acceleration of that object is
, the net force on that object would be
. Since the acceleration of this ball is
, the net force on this ball would be:
.
Answer:
t = 2 s
Explanation:
As we know that fish is pulled upwards with uniform maximum acceleration
then we will have
here we know that maximum possible acceleration of so that string will not break is given as
now we have
now for such acceleration we can use kinematics
t = 2 s
Answer:
The current through it will also decrease to half of its former value because according to Ohm's law the current flowing through a resistor is directly proportional to the potential difference applied across its ends provided that the temperature and some other necessary conditions remain constant.
This is mathematically represented as follows;
The current is thus given as
if R is constant and V is reduced to half, then we have the following;
Simplifying further we obtain
Equation (3) shows that the current I is also reduced to half.