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A crate of mass m (=30 kg) is placed at rest on a (frictionless) inclined plane, which has an angle (= 60o) above horizontal.
a) How long would it take the crate to slide 8 m down the incline?b) If the crate were kept from sliding by a rope pulling parallel to the incline, what would the size of the tension be?
a motorist drives north for 35 minutes at 85 km/h and then stops for 15 minutes. he then continues north traveling 130km in 2h. what was his total displacement
A miniblack hole formed as a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (Assume that your mass is 50).
A person wants to push an 80-kg box across the floor. The coefficient of friction between the box and the floor is 0.5. What is the normal force experienced by the box as it sits on the floor
A force vector has a magnitude of 590 newtons and points at an angle 44o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
Typical roller coasters only have one motor to pull the cars up to the top of the first and highest hill. explain why the first hill must be the highest
A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, How deep is the hole
In a science museum, a 130kg brass pendulum bob swings at the end of a 13.7m -long wire. how many oscillations will the pendulum have completed
A physical pendulum consists of a meter stick (of mass 0.3 kg) that is pivoted at a small hole drilled through the stick a distance x from the 50 cm mark. The meter stick is then released from rest (at a small angle from vertical) and allowed to o..
A 20 kg uniform beam is placed on two supporting stands on either end. A 75 kg painter stands at 1.2 m from one of the ends. find the forces at the two supports
A voltage of 20.0 V is applied across the two ends of a Tungsten wire with a temperature coefficient of resistivity of 4.50×10-3 1/K. determine the power dissipated by the wire
A block with mass of 4.52 kg is attached to a horizontal spring with spring constant k = 3.59 102 N/m, Find the speed of the block at the equilibrium point
Gas is confined in a tank at a pressure of 11.3 atm and a temperature of 22.5°C. what is the pressure of the gas remaining in the tank
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