A basketball is launched with an initial speed of 8.8 m/s and follows the trajectory shown. The ball enters the basket 0.98 s after it is launched. What are the distances x and y? Note: The drawing is not to scale.
What volume In liters is a cube 20cm on a side? If the cube is filled with water what is the mass of the water?
How much work does the force of gravity do in pulling a 10 kg box down a 30º inclined plane of length 8.0 m? Note that sin 30 = cos 60 = 0.500 and cos 30 = sin 60 = 0.866. Can someone explain this one?
A motorcycle starts from a standstill. In 15 seconds it reaches a velocity of 20 m/s. What is the motorcycle's average acceleration?
If a ball is rolling at a velocity of 1.5 m/sec and has a momentum of 10.0 kg·m/sec, what is the mass of the ball?
When two gears are mashed, the revolutions per minute (rpm) are inversely proportional to the number of gears
A lever used to lift a heavy box has an input arm of 4 meters and an output arm of 0.8 meters. What is the mechanical advantage of the lever?
A dragster going at 5 m/s north increases its velocity to 23 m/s north in 4 seconds. What is its acceleration during this time interval?
A dragster going at 5 m/s north increases its velocity to 23 m/s north in 4 seconds. What is its acceleration during this time interval?
A playground is on the flat roof of a city school, hb = 6.20 m above the street below (see figure). The vertical wall of the building is h = 7.70 m high, to form a 1.5-m-high railing around the playground. A ball has fallen to the street below, and a passerby returns it by launching it at an angle of θ = 53.0° above the horizontal at a point d = 24.0 m from the base of the building wall. The ball takes 2.20 s to reach a point vertically above the wall.(a) Find the speed at which the ball was launched.(b) Find the vertical distance by which the ball clears the wall.(c) Find the horizontal distance from the wall to the point on the roof where the ball lands.
