Work is performed while initially lifting books off the floor. The work is due to gravity.
Answer:
A) 7.0 m/s²
Explanation:
Acceleration is found by using the formula:
This means the change in time divided by the time interval will give us the car's acceleration.
Since the car starts from rest, its initial velocity is 0 m/s. Its final velocity is 35 m/s. The time interval for the car to go from 0 to 35 m/s is 5.0 seconds.
Substitute the final and initial velocity into the formula.
- a = (35 - 0)/5
- a = 35/5
- a = 7
The acceleration of the car is A) 7.0 m/s².
Explanation:
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Answer:
Spring constant = YA / L
Explanation:
Let F be the force being applied on cross sectional area A of metal bar due to which an extension of ΔL is obtained in the wire of length L then
stress = F / A
strain = ΔL /L
Young's modulus = ( F / A ) / (ΔL /L)
Y = ( F L / A ΔL )
( F / ΔL ) = ( YA / L )
Spring constant = ( F / ΔL )
Spring constant = YA / L
Answer:
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Explanation:
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