Two people each kick identical balls at the same angle. Person A kicks it at three times the speed of person B. How many times higher does A's ball go than B's? O 3 O 0.33 0 9 O 4

Here’s an interesting challenge you can give to a friend. Hold a $1 (or larger!) bill by an upper corner. Have a friend prepare to pinch a lower corner, putting her fingers near but not touching the bill. Tell her to try to catch the bill when you drop it by simply closing her fingers. This seems like it should be easy, but it’s not. After she sees that you have released the bill, it will take her about 0.25 s to react and close her fingers—which is not fast enough to catch the bill. How much time does it take for the bill to fall beyond her grasp? The length of a bill is 16 cm.

Two identical objects with the same initial speed collide and stick together. If the composite object moves with half the initial speed of either object, what was the angle between the initial velocities? 20° O 30° 450 60° 120°

The position of a bird in the xy-plane is given by = (4.0m-x t²)î + Btĵ where x= 2.5 m/s2 and B = 5 m/s . What is the magnitude of bird's net velocity at 2.0 s? %3D 4.0 m/s O7.1 m/s O 11.2 m/s 15 m/s O -5.0 m/s

A firecracker moves vertically upward and after reaching the highest point in its vertical trajectory, it starts falling down. After it falls down by 17.7 meters in air it cracks into two identical pieces. One of the pieces shoots off horizontally with 11.8 m/s speed. What would be the magnitude of the velocity of the other piece right after they split? Enter your answer in m/s. On your paper, show both your calculation for the magnitude and also the direction of the velocity vector of the second piece. Show your work in detail including your physics- based reasoning.

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Professional golfers can drive the ball over 200 m. While air resistance is significant, its effects are nearly canceled because lift is gained from backspin on the ball, and so a reasonable description of the ball’s trajectory is obtained if air resistance is neglected. Suppose a golfer hits a ball 200 m on level ground, giving it an initial velocity at an angle of 45o. The duration of the impact of the club and ball has been measured to be 1.00 ms. a) Calculate the velocity of the ball just after it is struck b) What is the 0.0450 kg ball's change in momentum?

Problem 7: A kid throws a water balloon at an angle of 62° towards his friend who is 8 m away. How fast would the water balloon leave the kid's hand so that it hits his friend at the same level it was thrown? Give your answer in m/s. Numeric : A numeric value is expected and not an expression. V =

Find the maximum height of this projectile provided with this equation

8. A motorbike is ridden up the left side of a symmetrical ramp. The bike reaches the top of the ramp at speed u, becomes airborne and falls to a point P on the other side of the ramp. e In terms of u, land g, obtain expressions for: (a) the time t for which the motorbike is in the air (b) the distance OP (= 1) along the right side of the ramp.