A stone is thrown with an initial speed of 15m/s at an angle of 53° above the horizontal from the top of a 35m building. If g=9.8m/s^2 and air resistance is negligable, then what is the speed of the rock as it hits the ground?

A ball has a mass of 0.150 kg and is given an initial speed of 20.4 m/s. When the ball is at a height of 15.3 m above the point it is thrown, what is its speed? Ignore air resistance.

The drawing shows a skateboarder moving at 6.90 m/s along a horizontal section of a track that is slanted upward by 0 = 46.0° above the horizontal at its end, which is 0.510 m above the ground. When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find the maximum height H to which she rises above the end of the track. Number 6.90m/s i H 0.510m Units

1. A girl jumps upward off a trampoline with a speed of 3.6 m/s. How high will she rise? Ignore air resistance. Previous submissions:

A 55 kg skier starts from rest at the top of a ski jump, point ? shown in the figure, and travels down the ramp. If friction and air resistance can be neglected, determine (a) her speed ?? when she reaches the horizontal end of the ramp at ?, and (b) the distance ? to where she strikes the ground at ?.

A proton (mass m = 1.67 × 10-27 kg) is being accelerated along a straight line at 6.20 x 10¹1 m/s² in a machine. If the proton has an initial speed of 8.50 x 104 m/s and travels 2.10 cm, what then is (a) its speed and (b) the increase in its kinetic energy? (a) Number (b) Number i Units Units

The drawing shows a skateboarder moving at 6.80 m/s along a horizontal section of a track that is slanted upward by 0 = 41.0° above the horizontal at its end, which is 0.780 m above the ground. When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find the maximum height H to which she rises above the end of the track. 6.80m/s 0.780m

The drawing shows a skateboarder moving at 6.70 m/s along a horizontal section of a track that is slanted upward by 0 = 48.0° above the horizontal at its end, which is 0.530 m above the ground. When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find the maximum height H to which she rises above the end of the track. 6.70m/s 0.530m

A proton (mass m = 1.67 × 10-27 kg) is being accelerated along a straight line at 9.80 × 1011 m/s2 in a machine. If the proton has an initial speed of 8.20 × 105 m/s and travels 5.90 cm, what then is (a) its speed and (b) the increase in its kinetic energy?

The skateboarder in the drawing starts down the left side of the ramp with an initial speed of 4.9 m/s. Neglect nonconservative forces, such as friction and air resistance, and find the height h of the highest point reached by the skateboarder on the right side of the ramp. ✔ < i