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What is the reason for the occurrence of...

What is the reason for the occurrence of systematic errors in an instrument ?
a) No use for a long time
b) High use
c) Manufacturing fault
d) Delivery fault

Text Solution

Verified by Experts

The forces acting on the block are shown in ure. Resolving the forces parallel to the incline, we get
`F-mg sintheta=ma`
`or, F=mgsintheta+ma`
`=(2.0)(9.8 m/s^2)(1/2)+1.0m/s^2]=11.8N`

The velocity at t=4.0 s is
`v=at=(1.0 m/s^2)(4.0s)=4.0m/s`
The power delivered by the force at t=4.0s is
`P=vecF.vecv=(11.8N)(4.0m/s)~~47W`
The displacement during the first four seconds is
`x=1/2at^2=1/2(1.0m/s^2)(16s^2)=8.0m`
The work done in these four seconds is therefore
`W=vecF.vecd=(11.8N)(8.0m)=9.44J`
The average power delivered `=(94.4J)/(4.0s)`
`=23.6W~~24W`
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