Part A A ball rolls over the edge of a table with a horizontal velocity v m/s. T

Question

Part A A ball rolls over the edge of a table with a horizontal velocity v m/s. The height of the table is 1.6 m and the horizontal range of the ball from the base of the table is 20 m. How long does it take for the ball to hit the ground? ANSWER: 2.0 s 0.29 s 0.57 s 9.8 s 1.14 s 3.2m 9 20-4-81() oy: t-2.0 ? a0981 1301 PE 1.4 Part A A bullet is fired at an angle of 30 above the horizontal with an initial speed of 100 m/s, on the flat ground. Calculate the range and maximum height of the projectile. ANSWER: range 620 m, height 150 m range 150 m, height 620 m range 883 m, height 150 m range 127 m, height 620 m range 883 m, height 127 m 1301 PE 1.5 Part A A 4.00 kg object slides down a frictionless inclined plane with an acceleration of 3.00 m/s2. What is the angle of the incline above horizontal? ANSWER

Explanation / Answer

A)

Time of flight of object

h= 0.5gt^2

1.6= 0.5* 9.8* t^2

t= 0.57 second

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Range, R= u^2 sin (2x)/g= 100^2 sin 60/9.8= 883 m

Max height, H= ( 100 sin 30)^2/(2*9.8)= 127 m

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For a inclined surface

a= g sin x

Sin x= 3/9.8

x= 17.825

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Comment in case any doubt.. good luck

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