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A mule uses a rope to pull a box that weighs 3.0 x 10^ 2 N across a level surface with constant velocity . The rope makes an angle of 30.0 degrees above the horizontal, and the tension in the rope is 100N. What is the normal force of the floor on the box?
a boy goes to market with a average speed of 29 kmh.he returns back half the way he went with a average speed of 40
A 98 ? resistor is connected in series with a 177 mH inductor and a 1.4 ?F capacitor. Find the effective voltage Vrms across the capacitor
A runner sprints around a circular track with circumference 400m. If he completes one lap in 45s, what is his average angular velocity
In an attempt to escape his island, Gilligan builds a raft and sets to sea. The wind shifts a great deal during the day, What is the angle of his final position relative to the island
A helicopter is ascending vertically with a speed of 5.20m/s. at a high of 125m above the earth, a package i dropped from a window. How much time does it take for the package to reach the ground? (Hint: the package's initial speed equals helicopte..
A pump, submerged at the bottom of a well that is 35m deep, is used to pump water uphill to a house that is 50m above the top of the well, as shown above. The density of the water is 1000 kg/m3. All pressures are gauge pressures. Top of well pipe to ..
A place-kicker must kick a football from a point 36.0 m (about 40 yards) from the goal. Half the crowd hopes the ball will clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 23.6 m/s at an angle of 48.0°..
what is the equivalent resistance between points A and B?
A 100kg hollow sphere is neutrally buoyant and completely underwater. Its volume is 0.5 cubic meter. what fraction of this volume is helium
A plane electromagnetic wave propagates in a vacuum in the z-direction. What is the mathematical expression for the magnetic field
Find the force to keep object moving.
A particle with a positive charge q= 8.6x10^-6C and a mass m= 0.45g moves with velocity v = 8m/s parallel to a wall. Find the sign and magnitude of the magnetic field
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