GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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300 N
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1200 N
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1900 N
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7500 N
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Detailed explanation-1: -The magnitude of the resultant force acting on the car is 1875 N. Given: A car has a mass of 1500 kg. A constant resultant force acts on the car and the car accelerates from, 15 m/s to 20 m/s in 4.0 seconds.
Detailed explanation-2: -Thus force required F=ma=1500×0. 5=750 N.
Detailed explanation-3: -1 Answer. The net force acting on the car is 3×103 Newtons.
Detailed explanation-4: -For example, when a car travels at a constant speed, the driving force from the engine is balanced by resistive forces such as air resistance and friction in the car’s moving parts. The resultant force on the car is zero.
Detailed explanation-5: -resultant force (N) = mass (kg) × acceleration (m/s 2 ) F = m × a. You will have to be able to state this equation in the examination.