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A soccer ball is kicked from the groundwith an initial speed of 19.9 m/s at anupward angle of 45°. A player 55 m away in the direction of thekick starts running to meet the ball at that instant. What must behis average speed if he is to catch the ball just before it hitsthe ground?
A grocery cart is pushed along an aisle by a shopper who exerts a constant horizontal force of . The acceleration of gravity is . If all frictional forces are neglected and the cart starts from rest, illustrate what is the grocery cart’s final s..
An aircraft door closes by pushing it inside the airplane first. We will assume P = 0 outside the aircraft, and P=0.9 atm inside during flight. what is the total force required to open the door while in flight
A sprinter explodes out of the starting block with an acceleration of +3.9 m/s2, What is her velocity at the end of the race
A parallel-plate air capacitor has a capacitance of 400pF and a charge of magnitude 0.150\muC on each plate. What is the surface charge density on each plate
Vector and scalar quantities. Part (a) Which of the following below is a scalar quantity? Part (b) What information do vectors quantities convey? Part (c) Which of the following is a vector quantity?
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 550 kg. Find the kinetic energy stored in the flywheel
An ideal spring of negligible mass is 11 long when nothing is attached to it. When you hang a 3.20- weight from it, you measure its length to be 12.3.
Find the normalization constant co and the probability of finding the particle in the interval ±a//5. What is the mean momentum?
Mars Rover When the Mars rover was deployed on the surface of Mars in July 1998, radio signals took about 14 {rm min} to travel from Earth to the rover. How far was Mars from Earth at that time.
A 0.900 kg block is attached to a spring with spring constant 18 N/m. What is the amplitude of the subsequent oscillations
A large crate is pulled along a horizontal path at a constant speed by a cable that is inclined at an angle of 20° with respect to the horizontal. How far will the crate move in 10 seconds
Two ice skaters, Daniel (mass 60.0kg ) and Rebecca (mass 45.0kg ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, What is the magnitude of Daniel's velocity after the collision
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