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A ball is thrown vertically upward with a speed of +10.0 m/s.
a) How high does it rise?
b) How long does it take to reach its highest point?
c) What is its velocity when it returns to the level from which it started?
d) How long does the ball take to hit the ground after it reaches its highest point?
A car travels at a constant velocity 30im/s for 20km, then it travels at 40im/s for the next 20km and, finally at 0im/s for the last 20km. Find the Average velocity and speed for the entire trip.
A cube floats in water. The length of each side is 8 cm. The cube is 3/4 submerged. find the weight of the cube in air
A bat moving with a speed of 4.10 m/s and emitting sound of 31.0 kHz approaches a moth at rest on a tree trunk. What frequency is heard by the moth
A 57.0 kg skateboarder starts out with a speed of 1.70 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. Calculate the change (?PE = PEf - PE0) in the gravitational potential energy
A 70 cm long, 0.8 mm diameter steel guitar string must be tightened to a tension of 2000 N by turning the tuning screws. By how much is the string stretched
In a cathode-ray tube electrons are projected horizontally at 1.5x10^6m/s and travel a horizontal distance 11.0cm across the tube. How long are the electrons in flight? Find the vertical distance the electrons fall (under the influence of gravity) du..
A car moves along the x-axis in the positive direction. Find the sign (+,-) of the velocity and acceleration of the car for each situation: 1. The car moves AWAY from the origin and gets FASTER 2.
A bird (mass 31 g) is flying at 11.1 m/s when it flies into a glass window and bounces off at a speed of 4.1 m/s. What is the average force on the bird during the collision
A rocket rises vertically, from rest, with an acceleration of 4.0m/s2 until it runs out of fuel at an altitude of 1400m. After this point, What maximum altitude does the rocket reach
A highway is to be built between two towns, one of which lies 50.0 km south and 80.0 km west of the other. at what angle would this highway be directed
A square loop 15 cm on a side in the xy plane. Its resistance is 0.55 ohms. determine the direction of the induced current in the loop
A horizontal force does 50 J of work on a box, while the kinetic friction force, between the box and the floor, What is the cange inn the box's kinetic energy
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