Answer:
Explanation:
The iron ring to be put on the rim of a cart wheel is always of slightly smaller diameter than that of the wheel. When the iron ring is heated to become red hot, it expands and slips on to the wheel easily. When it is cooled, it contracts and grips the wheel firmly.
When an object falls through the air, its velocity increases and its acceleration decreases.
<h3>
What is velocity ?</h3>
A vector measurement of the rate and direction of motion is what is meant by the term "velocity." Simply said, velocity is the rate of movement in a single direction. Velocity may be used to gauge both the speed of a rocket launching into space and the speed of a car traveling north on a busy freeway.
As you might have anticipated, the velocity vector's scalar (absolute value) magnitude corresponds to the motion's speed. The first derivative of position with respect to time is known as velocity in calculus. There is a straightforward formula that combines rate, distance, and time to calculate velocity.
The following method is the most typical approach to get the constant velocity of an item traveling straight ahead:
r = d / t
The rate or speed is r. (sometimes denoted as v for velocity)
d is the traveled distance.
t is the amount of time needed to finish the movement
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Answer:
Explanation:
Velocity of wave in stretched string is given by the formula
here we know that
T = 4 N
also we know that linear mass density is given as
so we have
now the tension in the string is double
so the velocity is given as
Answer:
28.3 kg
Explanation:
Assuming the ground is level, the normal force equals the weight.
N = mg
277 N = m × 9.8 m/s²
m = 28.3 kg