Gravity can be defined as a force of attraction between objects. The effects of gravity can be witnessed in many systems. Which
1 answer:
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Answer:D
Explanation:
For Rod 1
length,diameter and Tension is L, d and T
for Rod 2 length,diameter and Tension is 2L, 2d and 2T
Change in Length is given by
where P=load
L=length
A=area of cross-section
E=young's Modulus
since both are aluminium rod therefore E is common
Thus extension in both the rods are same
Answer:
Explanation:
We know that the acceleration a = F/m
- As the force is a function of time, it varies with time,
- The mass is constant
The velocity at t = 3 seconds is expressed as an integral of acceleartion over time, which is represented as
V (t=3) = 19+15 = 34 m/s