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Q. An artillery shell is fired with an initial velocity of 300 m/s at 47.5° above the horizontal. To clear an avalanche, it explodes on a mountainside 47 s after firing. What is the x and y components of the shell where it explodes, relative to its firing point?
Q. A 93kg water skier floating in a lake is pulled from rest to a speed of 11 m/s in a distance of 27 m.
What is the net force exerted on the skier, assuming his acceleration is constant?
A certain freely falling object requires 1.56 s to travel the last 37.0 m before it hits the ground. From what height above the ground did it fall.
A suitcase weighing 228N is at rest on the floor of a hotel lobby. The co-efficient of static friction between the suitcase and the floor is 0.49, and the coefficient of kinetic friction is 0.313. With what least amount horizontal force must a bel..
A 400 g lemming (does anyone remember that old computer game?) waddles horizontally off a small 4.90 m high cliff with a speed of 0.5 ms-1.How far from the base of the cliff will the lemming land? What will be the lemmings speed upon landing.
When she tightens the string slightly, she hears 6 beats/s. What is the frequency of string now.
Consider a rotational axis at point where the tire contacts the ground, directed vertical to the plane of the paper. Find out the magnitude of the man's force for both designs.
A 15.0 m uniform ladder weighing 500 N rests against a frictionless wall. The ladder makes a 60.0 angle with the horizontal. Find out the horizontal and vertical forces the ground exerts on the base of the ladder when an 800 N fire-fighter is 4.00m f..
Determine the simple harmonic motion of the spring what ac velocity is ball moving
A proton is placed in an electric field of intensity 700 N/C. What is magnitude and direction (towards or away from the field) of the acceleration of this proton because of this field? The charge on a proton is +1.6 x 10-19 C and the mass of a prot..
Change values of the initial position, initial velocity, and the acceleration of the car so that its center follows the same path as the dot. What is the equation that describes motion of the dot.
What speed limit should be posted for the curve. How long (in {rm ns}) does it take light incident vertical to the glass to pass through this 9.0 {rm cm}-thick sandwich.
A liquid with density of 1.65 x10 cubed kg/m cubed flows through 2 horizontal sections of tubing joined end to end. in the first section, the cross-sectional area is 10 cm2.
plan a free-body diagram for the charge.
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