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Consider a box in the back of a truck. If the truckaccelerates slowly the box moves with the truck without slipping. What forces act on the box to accelerate it? In what direction do those forces point, please show in a free body diagram? What happens to the box if the truck accelerates toquickly? Explain why this happens with newtons laws and models used to describe friction.
What is the Professors initial velocity. He is pushed a distance 3.00 m along the incline by a group of students who together exert a constant horizontal force of 595 N. The professor's speed at the bottom of ramp is 1.70 m/s.
The skater farthest out has a mass of 80.0 kg and is 6.40 m from the pivot. He is skating at a speed of 6.50 m/s. Describe the magnitude of the centripetal force that acts on him.
Your weight is due to the gravitational attraction of the Earth. The Moon, though, also exerts a gravitational force on you, and when it is overhead, Calculate the effect of the Moon on your weight
A circular steel plate of radius 0.10 m is cooled from350oC to 20oC. By what percentage does the plate's area decrease
What is the potential diffrence between two infinte parallel plates seperated by a distance d with uniform surface charge densities +s and -s, what is the voltage at positive infinity
At one instant, force = 5.40 N acts on a 0.399 kg object that has position vector = (1.81 -1.81) m and velocity vector = (-5.91 + 5.91) m/s. determine the object's angular momentum
During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 4.10 108 V, What is the change in an electron's electric potential energy
A 1.93kg block is placed against a compressed spring on a frictionless 27degree incline. How far up the incline will the block go before coming to rest
A merry-go-round starts from rest and accelerates uniformly over 10.5 s to a final angular velocity of 6.90 rev/min. Find the person's maximum radial acceleration
The x-position of a particle is given by the expression x(t)=(4.0 m)cos(4.0?t+ 5.0?) , where x is in meters and t is in seconds. What is the maximum velocity of the particle
q1. a steel wire with mass 20.8 g and length 1.09 m is strung on a bass so that the distance from the nut to the bridge
A certain radioactive material has an atomic mass of 172 and a half-life of 505 years (take 1 yr = 365.25 d). What is the activity of 0.9 g of this material?
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