Question

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This page LUNClusions on the back of C) 9.8 m/s o D) 10 miles per hour 18) Calculate the velocity acciate the velocity at time t=2s for a ball the A) 10.1 m/s B) -5.2 m/s C) 0.3 m/s D) 4.6 m/s straight up with an initial velocity of 15 m 19) A rock is tossed skyward at an angle of above the horizontal Tine. This A) the velocity of the rock is constant B) the trajectory of the rock y=fx) is a parabola c) the trajectory of the rock is an ellipse D) the trajectory of the rock is a straight line 20) A projectile is shot at an angle a with the horizontal axis. We consider air drag to be religible This means 90° A) The maximum height above the ground is the same for all a B) The greatest horizontal range (distance traveled horizontally) occurs when a C) The greatest horizontal range occurs when a = 60° D) The greatest horizontal range occurs when the launching angle is a 45° 21) An object is launched at an angle a = 50°. This means A) The horizontal component of the velocity versus time graph is a horizontal straight line because this component is constant B) The horizontal component of the velocity versus time graph is a parabolic curve due to the nonzero acceleration C) The vertical component of the velocity versus time graph is a parabolic curve because 8 = 9.8 m/s D) The vertical component of acceleration is zero 2) A cannonball is fired at a velocity of 25 m/s from ground level at an angle of 30° above the horizontal axis. How far does the ball travel? A) 55.23 m B) 50.47 m C) 54.28 m D) 45.87 m

Answer 1

TISMLS V= U+at Is-(9-82) V -4.6 ms 19 Taytctny is pada Lo la opHen-8 Reng 9145 maxm OPHn-D Op 1M-c G-8mls 22 PSINZO Range 9-8 R-SS-23 m