An orange fruit drops to the ground from the top of a tree 45m tall. How long does it takes to reach the ground? (g = 10m/s²)
A. 3.0s B. 4.5s C. 6.0s D. 7.5s E. 9.0s Correct Answer: Option A – 3.0s Explanation s = ut + ½gt² 45 = 0 + 5t² t = 3s
The diagram below shows the position of a simple pendulum set in motion. At which of the positions does the pendulum have maximum kinetic energy?
A. 5 B. 4 C. 3 D. 2 E. 1 Correct Answer: Option C – 3
A body moving with uniform acceleration has two points(5, 15) and (20, 60) on the velocity-times graph of its motion. Calculate
A. 0.25ms−² B. 3.00ms−² C. 4.00ms−² D. 9.00ms−² E. 16.00ms−² Correct Answer: Option B – 3.00ms−²
A ball is projected horizontally from the top of a hill with a velocity of 20m/s. If it reaches the ground 4 seconds later, what is the height of the hill? (g = 10m/s²)
A. 20m B. 40m C. 80m D. 160m E. 200m Correct Answer: Option C – 80m Explanation Initial horizontal velocity = 20m/s Initial vertical velocity = 0 s = ut + ½gt² = 0 x 5 x 4² = 80m
A body moves with a constant speed but has an acceleration. This process if it?
A. moves in a straight line B. moves in a circle C. is oscillating D. is in equilibrium E. has a varying acceleration Correct Answer: Option B – moves in a circleProducts
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