5. A ball starting from rest at the top of an inclined plane accelerates at 2 m/

Question

5. A ball starting from rest at the top of an inclined plane accelerates at 2 m/s and reaches the bottom of the plane in 2 seconds. What is the length of the plane? A. 9 m B. 8m C. 4m D. 2 m An apple falls from a tree and hits the ground 5 meters below with a speed of about A. 5 m/'s B. 15ms C.10 m/s D. not enough information. 6. At one instant an object in free fall is moving downward at 5 m/s. One second later its speed is A. 100 m/s B. 55 m/s 7. C. 50 m/s D. 15 m/s 8. At one instant a heavy object in air is moving upward at 50 m/s. One second later its speed is approximately A. 40 m/s B 50 m/s C 55 m's D 60 m's B. 50 m/s D. 60 m/s 9. The distance a freely falling object falls from rest in 2second is B. 40 m C. 20m D. none of the above A. 60m An object falls freely from rest on a planet where the acceleration due to gravity is 20 m/s After 5 seconds, the object will have a speed of 10. A 100 m/s B. 20 m/s C. 10 m/s D. 5 m/s

Explanation / Answer

According to the chegg guidelines I am allowed to answer only 1 question at a time.

1) a =2.0 m/s^2 and t = 2.00 seconds

s = ut +0.5 a t^2 = 0.5 * 2.00 * ( 2.00 ) ^2

s = 4.00 m ==============ANSWER) OPTION C)

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