Calculate the flight time of a projectile launched with a height of 23.5 m at an angle of 7 degrees and initial velocity of 3.42 m/s.
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A: Here we use equation of motion to solve the problem


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- A projectile is launched with an initial velocity of 46.3 m/s at an angle of 31.9 degrees with respect to the horizontal. In meters, what is the maximum upward displacement of the projectile?The same projectile experiment was conducted as you did in class. A racquet ball rolls down a track, leaves the track at an initial height of 0.961m above floor, with an exit speed Vexit 1.40m/s at an angle exit 7.46°. The landing spot was repeatedly measured for ten times, and the racquet ball's horizontal range data is provided below. Data run = Landing spot (m) 1 2 0.585 0.590 3 4 0.595 0.590 5 6 0.585 0.580 7 0.580 8 = 9 10 0.585 0.580 0.575A projectile is launched with a speed of 140 m/s at an angle of 45 degrees above the horizontal, from a height of 1500 m above the ground. How far does it travel in the horizontal direction before hitting the ground?
- A rock is launched over level ground with an initial velocity of 15.0 m/s at an angle of 20 degrees above the horizontal. What is the projectile’s time of flight?A horizontal projectile is shot with an initial velocity of 21 m/s from a height of 6.3 m above the ground. Neglecting air-resistance, how long it will take to reach the landing point (time in the air measured in seconds)?A golf ball was hit horizontally with a horizontal velocity of 40.0m/s from a height of 120m. How long does it take the ball to hit the ground?
- A potato is launched from the ground at an 73 degree angle with a velocity of 48 m/s. How many seconds is the projectile in the air?A boy throws a rock horizontally with a velocity of 8.0 m/s from a bridge. It falls 19.0 m to the water below. What is the magnitude of the velocity of the rock just before it hits the water?A cannon is placed at the bottom of a cliff61.5 m high. If the cannon is fired straight upward, the cannonballjust reaches the top of the cliff. (a) What is the initial speed of thecannonball? (b) Suppose a second cannon is placed at the top ofthe cliff. This cannon is fired horizontally, giving its cannonballsthe same initial speed found in part (a). Show that the range of thiscannon is the same as the maximum range of the cannon at thebase of the cliff. (Assume the ground at the base of the cliff is level,though the result is valid even if the ground is not level.)
- A fox fleeing from a hunter encounters a 0.770 m tall fence and attempts to jump it. The fox jumps with an initial velocity of 7.30 m/s at an angle of 45.0°, beginning the jump 1.93 m from the fence. By how much does the fox clear the fence? Treat the fox as a particle.The same projectile experiment was conducted as you did in class. A racquet ball rolls down a track, leaves the track at an initial height of 0.961m above floor, with an exit speed Vexit = 1.40m/s at an angle exit = 7.46°. The landing spot was repeatedly measured for ten times, and the racquet ball's horizontal range data is provided below. Data run 1 2 3 4 5 Landing spot 0.585 0.590 0.595 0.590 0.585 (m) 6 7 8 9 0.580 0.580 0.585 0.580 Please determine the x and y components of the racquet ball's initial velocity below (use downward direction as the positive direction.) 10 0.575A home run is hit in such a way that the baseball just clears a wall 16 m high, located 122 m from home plate. The ball is hit at an angle of 37° to the horizontal, and air resistance is negligible. (Assume that the ball is hit at a height of 1.0 m above the ground.)(a) Find the initial speed of the ball. m/s (b) Find the time it takes the ball to reach the wall. s (c) Find the velocity components of the ball when it reaches the wall. x-component m/sy-component m/s Find the speed of the ball when it reaches the wall. m/s