Explain with the help of an example how will you use a chipped edge meter scale to measure the length of a stick. Give answer with full exaplaination. but don't give precautions.
Answers
Answer:
Given that
The initial speed of car=u= 5 m/s
Acceleration =a=0.2m/s2
Time=t=10s
We need to calculate the distance
We know that
v = u + at
= 5 + 0.2×10
= 5+2
= 7 m/s
s = ut + 1/2at²
= (5×10) + (1/2)×(2/10)×(10×10)
= 50 + 10
= 60 m
Final speed = 7 m/s
Distance traveled in 10 seconds = 60 m
2) Given that
Initial velocity = 18 km/h
We will express it in m/s
So Initial velocity = 18 km/h= 18×5/18 m/sec= 5 m/sec
The final velocity = zero
Acceleration = change in velocity/time
= ( final velocity – intial velocity)/time
= ( 0 – 5)/2.5 = -2 m/s²
so, retardation = 2m/s²
Step-by-step explanation:
) To measure the length of a pencil using a metre rule, place metre rule with its marking close to the object. Here, let PQ e a pencil.
The end P of the pencil coincides with the zero mark on the ruler. The end Q of the pencil is read by keeping the eye at the position B vertically above the end Q.
So, the length of pencil is 4.3cm.
(b) The ends of the ruler get damaged with use and its zero mark may not be visible. To measure the length of an object with such a ruler, the object is placed close to a specific markings on the ruler and positions of both ends of the object are read on the ruler.
The difference between the two readings gives the length of the object. In the figure shown below, the reading on ruler at the end X is 1.0cm and at the end Y is 4.3cm. So the length of the rod XY is 4.3 - 1.0 = 3.3cm.
