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019 10.0 points A cannon fires a 0.579 kg shell with initial velocity Vi-11 m/s in...
A mortar fires a shell of mass m = 1.79 kg at speed v0. The shell explodes at the top of its trajectory (shown by a star in (Figure 1)) as designed. However, rather than creating a shower of colored flares, it breaks into just two pieces, the smaller one of which has a mass 0.240 kg . If there had been no explosion, the shell would have landed a distance r = 172 m from the mortar. Both pieces land at...
016 10.0 points In order to open the clam it catches, a seagull will drop the clam repeatedly onto a hard surface from high in the air until the shell cracks. If a seagull flies to a height of 27 m, how long will the clam take to fall? The acceleration of gravity is 9.8 m/s2 Answer in units of sec. 017 10.0 points If you drop an object, it will accelerate down- ward at a rate of g =...
Answer in units of m/s. Fo tic av 012 10.0 points An object is thrown vertically up and attains an upward velocity of 50 m/s when it reaches one fourth of its maximum height above its launch point. What was the initial speed of the object? The acceleration of gravity is 9.8 m/s. Answer in units of m/s 013 10.0 points A rock is thrown downward from an unknown height above the ground with an initial speed of 13 m/s....
1. A cannon fires a cannonball at an angle of 30° above horizontal. The initial velocity of the cannonball is 40 m/s. Assume the coordinate system in which x is horizontal and y is vertical. (a) What is the x-component of the initial velocity? '40 % cos ao (b) What is the y-component of the initial velocity? (c) Gravity causes a constant acceleration of 9.81 m/s. In what direction is this acceleration? (d) What affect will this acceleration have on...
018 (part 1 of 2) 10.0 points An elevator accelerates upward at 1.2 m/s The acceleration of gravity is 9.8 m/s What is the upward force exerted by the floor of the elevator on a(n) 92 kg passenger? Answer in units of N 019 (part 2 of 2) 10.0 point:s If the same elevator accelerates downwards with an acceleration of 1.2 m/s2, what is the upward force exerted by the elevator floor on the passenger? Answer in units of N
The cannon on a battleship can fire a shell a maximum distance of 38.0 km. (a) Calculate the initial velocity of the shell. ? m/s (b) What maximum height does it reach? (At its highest, the shell is above a substantial part of the atmosphere--but air resistance is not really negligible as assumed to make this problem easier.) ? m (c) The ocean is not flat, since the earth is curved. How many meters lower will its surface be 38.0...
020 10.0 points A bird is flying with a speed of 14.7 m/s over water when it accidentally drops a 1.60 kg fish The acceleration of gravity is 9.81 m/s4 If the altitude of the bird is 6.40 m and air resistance is disregarded, what is the speed of the fish when it hits tho water Answer in units of m/s 021 (part 1 of 3) 10.0 points A pulley system lifts a 1493 N weight a dis- tance of...
198965-15470403231811 x+ t 38228287 918.dvi 1/4 .5 s? Answer in units of m. 006 (part 1 of 5) 10.0 points A projectile of mass 0.548 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 7 m/s. ce The projectile rises to a maximum height of y above the end of the cannon's barrel and strikes the ground a horizontal distance Δ 8228287 past the...
020 (part 1 of 3) 10.0 points You are driving at the speed of 34.8 m/s (77.862 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes and begins to slow down with the largest deceleration possible without skid- ding. Considering an average human reaction, you press your brakes 0.576 s later. You also brake and decelerate as rapidly as possible without skidding. Assume that the coefficient of static friction is 0.722 between both...