A packet of mass (m) is unloaded from a truck by using inclined plane from a height (h) asshown in the given figure.
Correct answer: D. D: The gravitational component along the plane causes the packet to slide down.
- A. A: The packet moves without any external force.
- B. B: The packet accelerates due to gravitational force.
- C. C: The packet remains stationary unless pushed.
- D. D: The gravitational component along the plane causes the packet to slide down.
Explanation
The correct answer is Option D: The gravitational component along the plane causes the packet to slide down. When a packet is placed on an inclined plane, gravity acts on it, causing it to accelerate down the plane. The force of gravity can be divided into two components: one perpendicular to the plane and one parallel to it. The parallel component causes the packet to slide down the plane. Options A, B, and C are incorrect because they either ignore the effects of gravity or fail to account for the inclined plane's role in the motion.
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About Potential Energy
Potential energy is energy stored because of position or configuration, including gravitational potential energy near Earth's surface and elastic energy in a stretched or compressed spring. Questions use changes in potential energy and conservation of mechanical energy, while distinguishing a chosen reference level from an absolute zero of energy.
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