A particle is moving along a straight line with the acceleration a (12t-3t^1/2)ft/s^2 where t is in seconds. Determine the velocity of the particle as a function of time. When t=0,v=0 , and s= 15 .
A ball is thrown at an angle of 30 degrees with an initial velocity of 20 m/s at an elevation of 10 m. How long will it take to hit the ground? How far did it go?
The energy wasted by the light bulb for every 100 I of electrical energy supplied to it
the photograph above shows a virus attacking a human T cell (immune cell). Which disease could result if many T cells are destroyed in this manner?
A 14,700 N car is traveling at 25 m/s. The brakes are applied suddenly, and the car slides to a stop. The average braking force between the tires and the road is 7100 N. How far will the car slide once the brakes are applied?
An apple weighs about 1 N. What is its mass in kilograms?What is its weight in pounds?
What maximum mass can be lifted 45 ft with a moor that produces 15 hp
a. Make a list of given quantities and quantities to find, labeled with units and appropriate algebraic signs (+,-) b. what is the acceleration of the rock? c. Calculate the rock’s height after 1 sec d. Calculate the time required to reach an upward speed of 3 m/s e. Calculate the time required to reach a downward speed of 5 m/s
what is a periodic wave?
A 5.0kg sled is being pulled across a cement sidewalk at constant velocity. The coefficient of friction, mu, between the cement and sled runners is 0.77. What is the kinetic friction force acting on the sled?
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