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A man is using a cord to tow a sled at constant speed on a horizontal ground surface. The mass of the sled is 10 kg. The man pulls on the cord with a force of 71 N. The cord is straight and at an angle of 29° above the horizontal. How big is the normal force (in N) of the ground on the sled?
A horizontal force of 12 N pushes a .5 kg book against a vertical wall. The book is initally at rest. compute the magnitude of the frictional force
As seen from the window of a space station, a 99.0 kg satellite sailing along at 9.4 m/s collides head-on with a small 286.0 kg asteroid, What is the final velocity of the satellite
An electron is released a short distance above Earth's surface, the first electron just great enough to cancel the gravitational force on it, How far below the first electron is the second
the propeller of a light plane has a length of 1.752 m and a mass of 19.96 kg. the rotational energy of the propeller
The image of a tree on a 35 mm color slide is 1.4 mm high. It is to be projected onto a screen 6 m from the slide, and is to appear 380 mm high. What is the magnification of the system
A muscle-tendon unit is composed of a tendon with a stiffness of 6640N/m, a muscle with a stiffness of 9070N/m, What is the stiffness of the muscle-tendon unit
Light is incident normally on the largest face of an isosceles-right-triangle prism. What is the speed of light in this prism
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 25 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 35 cm.
Two steel guitar strings have the same length. String A has a diameter of 0.59 mm and is under 450.0 N of tension. Find the ratio of the wave speeds
The x, y, and z components of a vector A are , and the components of a vector B are . What is the angle between these two vectors
Calculate the x component of the velocity of the particle.
You exert a force as shown in the diagram to push a large crate of books (about 1 m high, m = 45.0 kg) across a rough floor at constant speed v = 0.650 m/s. Find the rate at which work is done by you
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