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A raindrop of mass 3x10^-5kg travelling at speed of 20miles/h strikes a walking man of 64kg with velocity -15m/s. Find the final velocity.
A fish swimming in a horizontal plane has velocity Vi=(4i+j)m/s at a point in the ocean where the position relative to a certain rock is ri=(10i -4j)m. After the fish swims with constant acceleration for 20s, its velocity is Vf =(20i – 5j)m/s. a) Find the acceleration of the fish b) If the fish maintains this constant acceleration, where is it at t=25s?
1.A 90.0-N box is pulled 10.0 m along a level surface by a rope. If the rope makes an angle of 20.0° with the surface, and the force exerted through the rope is 75.0 N, the work is done on the box is ___J. (Give your answer with the correct number of sig digs and do not include units)
2.A 25.0-N object is held 2.10 m above the ground. The potential energy of the object with respect to the ground is ___J. (Give your answer with the correct number of significant digits and do not include units).
3.The kinetic energy of a 20.0-N object is 5.00 × 102 J. The speed of this object is ___m/s. (Give your answer with the correct number of sig digs and do not include units).
4.A 10.0-N object is accelerated uniformly from rest at a rate of 2.5 m/s2. The kinetic energy of this object after it has accelerated a distance of 15.0 m is ___J. (Give your answer with the correct number of sig digs and do not include units).
1.A 60.0-kg student runs at a constant velocity up a flight of stairs. If the vertical distance of the stairs is 3.2 m, the work done against gravity is ___x103 J (Give your answer with the correct number of sig digs and do not include units).
Use the information below to answer the following 4 questions.
A 10.0-kg object is accelerated horizontally from rest to a velocity of 11.0 m/s in 5.00 s by a horizontal force.
1.The acceleration of the object is ___m/s2. (Give your answer with 3 sig digs and do not include units).
2.The horizontal force given to the object is ___N. (Give your answer with 3 sig digs and do not include units).
3.The distance travelled by the object is ___m. (Give your answer with 3 sig digs and do not include units).
4.The work done on the object is ___J. (Give your answer with 3 sig digs and do not include units).
force, how much greater will be the acceleration? Show your answers mathematically and justify
your answers.
From the definition of pressure we can say that P=F/A pressure is directly proportional to force and force is directly proportional to area
Why Can't we say that pressure is directly proportional to area
An inverted image is formed by a lens. The image formed is 4 times the size of the object at 5cm from it. Calculate the power at the lens.
