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An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. (a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first half of the swim, (b) the second half of the swim, and (c) the round trip. (Use any variable or symbol stated above as necessary.) first half second half round trip (b) What is her average speed for the round trip? average speed = m/s
First work out the momentum before and after hitting the table. Don't forget the gravitational force.
What is an actual mechanical advantage of the system
a projectile is fired with an initial velocity of 35 m/s at an angle of 30 degrees above horizontal of a 30 feet tall building. find (a) the max height of the projectile
A 4.00-g bullet is moving horizontally with a velocity of +355 m/s, where + sign indicates that it is moving to the right. The bullet is approching two blocks resting on a horzizonta frictionless surface.
What is the work completed by the block and tackle system?
A 1000-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam.
What is the angular velocity of the disk. If a single bit requires 5 µm of length along the motion direction, how many bits/second can the writing head write when it is 3.0 cm from the axis? display all work and explanations.
Find out the magnitude of the friction force acting on the case. Laser light with a wavelength = 680 illuminates a pair of slits at normal incidence. What slit separation would produce first-order maxima at angles of 40 from the incident direction.
The mass m =1 kg is set up as a pendulum of length 0.6m as shown on the diagram. Initially in the position of h = 0.2m above the lowest point, and the pendulum is given initial speed of 1m/s. What is the largest mass M that might be temporarily lifte..
A 1.0-cm-diameter pipe widens to 2.0 cm, then narrows to 0.5 cm. Liquid flows through the first segment at a speed of 9.0 m/s.
make use of the force equation of equilibrium with torques to compute around the second pivot pt, fine the women's position when the beam is about to tip.
An ideal gas initially at 20°C and 199 kPa has a volume of 3.40 L. It undergoes a quasi-static, isothermal expansion until its pressure is reduced to 94 kPa. (a) Find the work done by the gas. J (b) Find the heat added to the gas during the expans..
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