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A chimpanzee sitting against his favourite tree get up and walk 45 m due north and 22 m due west to reach a termite mound,where he eats lunch.What is the shortest distance between the tree and the termite mound, and what angle does the shortest distance make with respect to due north? A.6,9 m;105° B.10 m;10° C.50 m;26.1° D.0.08 m;90° E.22 m;45°
A block with mass 10 [kg] is attached to
a string tightly wound to circular frictionless pulley of
radius 0.300[m]. The block is dropped from a height of
2.50 [m] from the ground. Right before the block hits the
ground, the pulley of unknown mass was found to have
an angular velocity of 9 [rad/s]. What is the angular
acceleration of the pulley?
A driver is planning to make a short trip with his car, one that is a distance of 3 km and one that is a distance of 4 km.The resultant displacement from these two trips is 5 km in any given direction.Which vector diagram is correct?
A partly full paint can has 2.75 liters of paint left in it. What is volume of the paint in cubic
centimeters?
. Calculate the wavelengths of sounds at the extremes of the audible range, 20 and 20, KHz, in
30.0°C air.
relative to the Earth, spaceship A moves in one direction with speed 0.8c and another spaceship, B, moves in the opposite direction with speed 0.6c. What is the speed of spaceship A as measured by B?
Explain the relationships among angular and linear displacement, angular and linear velocity, and angular and linear acceleration?
For the previous question, if it actually takes 25 minutes to reach the cruising altitude and speed, how much energy is lost to air resistance? Give an answer in GJ (gigajoules, 1 GJ = 10° J) to two significant figures of accuracy.
Each of the four engines can produce a power of 56 MW (megaWatts). Again, assuming no air resistance, how long would it take the plane to reach its cruising speed and altitude? Assume the mass of the plane is constant. Give an answer in minutes and to one decimal place of accuracy.
A car starts motion from rest and travels for 5 sec. with a uniform acceleration of +1.5 m/sec2. The driver then applied the brakes, causing a uniform acceleration of -2 m/sec2 if the brakes are applied for 3 sec. How long it takes the car from the beginning of the motion to get to a complete stop?
