19. Archie initially pushed up a crate along a plane which is inclined at 20 degrees from the horizontal. Its highest vertical altitude from where it started is one meter. Find the initial speed in m/s * O a) 0 O b) 2.6 O c) 4.4

A package is released from a plane which is flying horizontally over flat horizontal ground.After release the package has an initial velocity which is the same as the plane.When the package is released, the plane is a height H above the ground and the speed of the plane is V.If we ignore air resistance, which statement is correct about the time interval between when the package is released and when it hits the ground? It depends only on H and not on V. It does not depend on either H or V.     It depends only on V and not on H. It depends on both H and V. -

2. An object of mass 200 g (0.2 kg) is thrown vertically upwards with a velocity of 8 m/s from a height of 10 m above the ground. It reaches certain maximum height and falls straight back to ground. Ignore air resistance in this problem. (a) Draw v-t graph that represents the velocity of the object after it is launched upwards and until it hits the ground. (b) How long does it take for the object to reach the maximum height? (c) What is the maximum height of the object from the ground? (d) How long does it take for the object to reach the ground from the highest point of motion? (e) What is the velocity of the object as it reaches ground? (Hint: Not zero).

2. A 60 kg skateboarder comes over the top of a hill at 5.0 m/s, and then skates down an increasingly steep grade to a point halfway above the bottom of the hill, before rolling out on a much gentler slope near the bottom. The boarder's speed at the bottom of the hill is 10 m/s. (Ignore friction for this problem.) 75 S (a) Is the acceleration of the boarder down the hill constant? Explain why or why not. (b) Find the net work done on the skateboarder between the top and bottom of the hill.

A 4 kg ball is thrown from 6 m tall building (point A) at initial vilocity 28 m/s. As shown in the figure, the ball settled at point B on top of another building with a height of 15 m above the ground . Ignoring air resistance, what is the velocity of the ball just before it strikes the top bf the other building at point B? h2- 36.6 m/s O 33.6 m/s O 24.6 m/s O 18.6 m/s O 196 m/s

A 20 N stone is thrown vertically upward from the ground. It is observed that, when it is 15 m above the ground, it travels with a velocity of 25 m / s upwards. What will its speed be when it is thrown? A) 30.31 m/sB) 15.16 m/sC) 18.19 m/sD) 319 m/s

A rock is thrown from a bridge 21 m above water with an initial speed of 14 m/s. Assuming negligible air resistance, what is the speed that the rock hits the water with, in meters per second?

4.14

At the Earth's surface, a projectile is launched straight up at a speed of 7.5 km/s. To what height will it rise? Ignore air resistance. 2.87e+06 Your response differs from the correct answer by more than 10%. Double check your calculations. m

A projectile is thrown vertically with a speed of 34.6 m/s from the edge of cliff 137 m in elevation. What is its speed in m/s just before hitting the ground at the bottom of the cliff?