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A soccer ball is kicked from the ground with an initial speed of 21.0 m/s at an upward angle of 45°. A player 58.0 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before it hits the ground? (Consider up and the direction of the ball's initial motion to be the positive y and x directions.)
The kinematics and dynamics of rotation around a fixed axis of a rigid body are mathematically much simpler than those for free rotation of a rigid body; they are entirely analogous to those of linear motion along a single fixed direction, which is n..
A thin spherical shell has a radius of 1.80 m. An applied torque of 1060 N m imparts to the shell an angular acceleration equal to 5.70 rad/s2 about an axis through the center of the shell
The speed of light in a particular type of glass is 1.69 108 m/s. What is the index of refraction of the glass
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. What was the speed of the lighter car just after the collision
Estimate the air pressure at the cloud base from the problem 1 assuming isothermal atmosphere with the average temperature between the cloud base and the surface
An ideal gas occupies a volumeof 2.0 cm3 at 20°C andatmospheric pressure. Determine the number of molecules of gas inthe container
An object of mass M = 2.00 kg is attached to a spring withspring constant k = 88.0 N/m whose unstretched lengthis L = 0.100 m, and whose far end is fixedto a shaft that is rotating with an angular speed of omega = 2.00 radians/s
a ball with a mass of 12 kg is traveling towards the left at a speed of 10 ms another ball with a mass of 14 kg is
a 34g glass thermometer reads 22.1c before it is placed in 145 ml of water. when the water and thermometer come to
What is the acceleration in m/s of a 0.001kg bullet if the force of recoil gives an acceleration of 4.390 m/s? The gun has mass of 0.20 kg.
State clearly the difference (a) between electric potential and electric field, (b) between electric potential and electric potential energy.
A horizontal beam of vertically polarized light of intensity 43 W/m2 is sent through two polarizing sheets. What is the intensity of the light transmitted by the pair of sheets
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