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A woman throws a ball at a vertical wall d = 3.0 m away. The ball is h = 1.5 m above ground when it leaves the woman's hand with an initial velocity of 12 m/s at 45°. When the ball hits the wall, the horizontal component of its velocity is reversed; the vertical component remains unchanged. (Ignore any effects due to air resistance.)
(a) Where does the ball hit the ground? m (away from the wall)
(b) How long was the ball in the air before it hit the wall? s
(c) Where did the ball hit the wall? m (above the ground)
(d) How long was the ball in the air after it left the wall? s
A bucket filled with dirt of mass 20 kg is suspended by a rope that hangs over a pulley of mass 30 kg and radius 0.25 m. Everything is initially at rest.
Find the moment of inertia of the plate for an axis that lies in the plane of the plate, passes through the center of the plate, and is perpendicular to the axis in part A
A charge of + 2.00nC is uniformly distributed on a ring of radius 10.0cm that lies in the x = 0 plane and is centered at the origin. Find the work required to move the point charge to the origin.
An 52.0 N box of clothes is pulled 6.7 m up a 30.0° ramp by a force of 107 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, compute the change in the box's kinetic energy.
If a bullet is fired vertically upwards with the speed calculated in (b), what is the maximum height that the bullet can reach.
A car of mass 1430 kg traveling at 28 m/s is at the foot of a hill that rises 105 m in 3 km. Find the average power delivered by the car's engine
At an instant in time, an electron has a velocity of 5i + 3j - 4k km/s in a region of space, Find the acceleration of the electron at this instant
Two children pull in opposite directions on a toy wagon of mass 9kg. One exerts a force of 18 N and the other exerts a force of 46 N
what is the diameter of the copper rod. Pull horizontally on a crate with a force of 140 N and it slides across the floor in a dynamic equilibrium. How much friction is acting on crate.
Two sinusoidal waves of the same period, with amplitudes of 7.0 and 9.0 mm, What is the phase constant of the other wave
Point A is located 0.259 m away from a charge of -2.11 x 10-9 C. Point B is located 0.487 m away from the charge. What is the electric potential difference VB - VA between these two points.
A specimen of oil having an initial volume of 600cm3 is subjected to a pressure increase of3.6×106Pa, What is the bulk modulus (in Pa) of the material
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