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Q. A hiker's trip consists of three segments. Path A is 8-km long heading 60.0 degrees north of east. Path B is 7.0 km long in a direction due east. Path C is 4sa-km long heading 315 degrees counter clockwise from east. Graphically add hiker's displacements in the order A, B, C
Q. A 61.0 kg boy and a 39-kg girl use an elastic rope while engaged in a tug-of-war on an icy frictionless surface. If the acceleration of the girl toward the boy is 3m/s2, determine the magnitude of the acceleration of the boy toward girl.
Volcanoes on the Earth eject rocks at speeds of up to 160 m/s. Consider a 1260 m high volcano that ejects rocks in all directions. What is the maximum height above sea level reached through rocks.
The burning of gasoline in a car releases about 3 × 10^4 kcal/gal. If a car averages 43 km/gal when driving 90 km/h, which requires 20 hp, what is an efficiency of the engine under those conditions.
A tiger leaps horizontally from a 5.90 m high rock with a speed of 4.10 m/s. How far from the base of the rock will she land.
An airplane is flying with a velocity of 93.0 m/s at an angle of 22.0^circ above the horizontal. When the plane is a distance 119 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
How high will a 1.85 rock go if thrown straight up by someone who does 75 of work on it? Avoid air resistance.
A 320 kg rocket sled can be accelerated at a constant rate from rest to 1400 km/h in 2.0 s. What is the magnitude of the necessary net force.
Objects with masses of 145kg and a 445kg are separated by 0.330m. At what position (other than infinitely remote ones) can the 32kg object be placed so as to experience the net force of zero.
Discover minimum thickness of glass
Displacement is which of the following types of quantities.
A computer disk is 8.0 in diameter. A reference dot on the edge of the disk is initially located at the disk accelerates steadily for 0.50, reaching 2000.
An AA battery is connected to a parallel-plate capacitor having 4 diameter plates spaced 3 apart. How much charge does the battery move from one plate to the other.
A pair of speakers separated by 0.900 m is driven by the same oscillator at a frequency of 672 Hz. An observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers. (Assume the spe..
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