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Fromt= 0 tot= 4.39 min, a man stands still, and fromt= 4.39 mintot= 8.78 min, he walks briskly in a straight line at a constant speed of2.01 m/s. What are(a)his average velocityvavgand(b)his average accelerationaavgin the time interval 1.00 min to5.39 min?What are(c)vavgand(d)aavgin the time interval2.00 minto6.39 min?
A startled armadillo leaps upward, rising 0.546 m in the first 0.209 s.(a)What is its initial speed as it leaves the ground?(b)What is its speed at the height of 0.546 m?(c)How much higher does it go?
A certain elevator cab has a total run of 205 m and a maximum speed is 307 m/min, and it accelerates from rest and then back to rest at 1.12 m/s2.(a)How far does the cab move while accelerating to full speed from rest?(b)How long does it take to make the nonstop 205 m run, starting and ending at rest?Catapulting mushrooms. Certain mushrooms launch their spores by a catapult mechanism. As water condenses from the air onto a spore that is attached to the mushroom, a drop grows on one side of the spore and a film grows on the other side. The spore is bent over by the drop's weight, but when the film reaches the drop, the drop's water suddenly spreads into the film and the spore springs upward so rapidly that it is slung off into the air. Typically, the spore reaches a speed of1.70 m/sin a5.00mlaunch; its speed is then reduced to zero in1.00 mmby the air. Using that data and assuming constant accelerations, find the acceleration in terms ofgduring(a)the launch and(b)the speed reduction
A solid block is suspended from a spring scale. If the reading on the scale when the block is completely immersed in water is 34.0 N, what are the block's volume and density
A 3.0kg object is subject to a restoring force. The potentialenergy of the object as a function of the distance from equilibriumis shown above. What is the objects potential energy when itsdisplacement is +4 cm from its equilibrium position
The earth spins on its axis once a day and orbits the sun once a year (365.24 days). Find its angular velocity as it revolves around the sun
Mary weighs 505 N. She walks down a flight of stairs to a level 5.50 m below her starting point. What is the change in Mary’s potential energy?
question1a 1.35 kg block is attached to a spring with spring constant 15.0 nm. though the block is sitting at rest a
A uniform magnetic field (0.20 T) is directed 35 degrees above the horizontal, penetrating a horizontal circular coil (radius 6.0 cm)
A space station is to provide artificial gravity to support long-term stay of astronauts and cosmonauts. It is designed as a large wheel, with all the compartments in the rim, how long should the motor fire
In a new (inelastic) collision, the same two bumper cars with the same initial velocities now latch together as they collide. What is the final speed of the two bumper cars after the collision
arie van wijngaarden shoots a puck at his goaltender father. arie stands 30 meters from a net having dimensions 3
A Carnot engine operates between 235°C and 125°C, absorbing 6.30 ? 104 J per cycle at the higher temperature. How much work per cycle is this engine capable of performing
What is the kinetic energy of the Earth's rotational (spin) motion
a quarterback claims that he can throw the football a horizontal distance of 196.6 m 215 yd. furthermore he claims that
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