A body is pulled through a distance of 500m by a force of 20N. If the power developed is 0.4kW, calculate the time for which the force acts.
A. 250.0s B. 25.0s C. 2.5s D. 0.5s Correct Answer: Option B B. 25.0sThe S.I unit of heat is?
A. joule B. kelvin C. watt D. ampere Correct Answer: Option A A. jouleA girl stands on a scale in a lift. If the reading on the scale is less than her weight, then the lift is moving?
A. upward at uniform speed B. upward with uniform acceleration C. downward with uniform speed D. downward with uniform acceleration Correct Answer: Option D D. downward with uniform accelerationA resultant force of magnitude 15N acts on a body of mass 250g. Calculate the magnitude of the acceleration.
A. 0.06 ms‾² B. 3.75ms‾² C. 16.67ms‾² D. 60.00ms‾² Correct Answer: Option D D. 60.00ms‾² Explanation g = F/M =15/0.25=60Products
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