Exam 4: Two-Dimensional Kinematics

A person throws a ball horizontally from the top of a building that is 24.0 m above the ground level.The ball lands 100 m down range from the base of the building.What was the initial velocity of the ball? Neglect air resistance and use g = 9.81 m/s².

A hockey puck slides off the edge of a horizontal platform with an initial velocity of 20 m/s horizontally and experiences no significant air resistance.The height of the platform above the ground is 2.0 m.What is the magnitude of the vertical component of the velocity of the puck just before it hits the ground?

A boy throws a ball with an initial velocity of 25 m/s at an angle of 30° above the horizontal.If air resistance is negligible,how high above the projection point is the ball after 2.0 s?

A cat leaps to try to catch a bird.If the cat's jump was at 60° off the ground and its initial velocity was What is the highest point of its trajectory,neglecting air resistance?

A child throws a ball with an initial speed of 8.0 m/s at an angle of 40° above the horizontal.The ball leaves her hand 1.0 m above the ground.At what angle below the horizontal does the ball approach the ground?

For general projectile motion with no air resistance,the horizontal component of a projectile's velocity

An athlete participates in an interplanetary discus throw competition during an Olympiad that takes place on a planet where the acceleration due to gravity is 9.7 m/s².He throws the discus with an initial velocity of 20 m/s at an angle of 60° from the vertical.Neglecting air resistance and the height of the discus at the point of release,what is the range of the discus?

A rock is thrown from the upper edge of a tall cliff at some angle above the horizontal.It reaches its highest point and starts falling down.Which of the following statements about the rock's motion are true just before it hits the ground? (There could be more than one correct choice. )

A projectile is fired from ground level on a horizontal plain.If the initial speed of the projectile is now doubled,and we neglect air resistance,

A boy throws a rock with an initial velocity of At 30.0° above the horizontal.How long does it take for the rock to reach the maximum height of its trajectory if air resistance is negligibly small and g = 9.80 m/s²?

A fisherman casts his bait toward the river at an angle of 25° above the horizontal.As the line unravels,he notices that the bait and hook reach a maximum height of What was the initial velocity he launched the bait with? Assume that the line exerts no appreciable drag force on the bait and hook and that air resistance is negligible.