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A force P pulls on a crate of mass m that is in contact with a horizontal rough surface. This force P has a magnitude of 160 N and is applied at an angle of 60° above the horizontal towards the right. In addition, there are three other forces acting on the crate. W, the weight of the crate, has a magnitude of 196 N and is directed vertically downward. f, the frictional force, has a magnitude of 80 N and is directed horizontally towards the left. FN, the normal force, is directed vertically upward. Which statement best describes the motion of the crate?
Calculate the the electrical repulsion that each bag exerts on the other. Imagine two 2.0{\rm g} bags of protons, one at the earth's north pole and the other at the south pole.
A speedboat moving at 33.0 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of ?3.20 m/s2 by reducing the throttle. (a) How long does it take the boat to reach the buoy? (b) Find the total tim..
A spring oscillator is designed with a mass of 0.258 kg. It operates while immersed in a damping fluid, selected so that the oscillation amplitude will decrease to 1.00% of its initial value in 8.34 s
You have a 96.1-cm-long copper rod with a rectangular cross section of dimensions 5.47 cm by 7.39 cm. Find the heat current* through the rod
A screen is placed 1.30 {rm m} behind a single slit. The central maximum in the resulting diffraction pattern on the screen is 1.70 {rm cm} wide-that is, two first-order diffraction minima are separated by 1.70 {rm cm}.
How many rulings must a 4.22-cm-wide diffraction grating have to resolve the wavelengths 415.544, At what angle are the second order maxima found
A 4.5m long, non uniform beam weighing 750N, supported by two weighing cables, is at rest in horizonal position as shown . The cable on the right has a tension of T1=650 N.
A 50 kg box is being pushed a distance of 7.0 m across the floor by a force whose magnitude is 164 N. The force is parallel to the displacement of the box.
A 36.4 kg child starting from rest slides down a water slide with the vertical height of 20.7 m. (Neglect friction.) What is the child's speed three-quarters of the way down.
Describe the method used to measure the Sun's shadow and in the drawing on page 18 what are the letters b and d used for?
Iif the collision is perfectly elastic, what is the ball's speed immediately after the collision? Illustrate what is the maximum compression of the spring?
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 23cm apart. What is the wavelength of the sound
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