use,
m*g*h=1/2*m*v^2
==> v=sqrt(2*g*h)
v=sqrt(2*9.8*6)
v=10.84 m/sec or 11 m/sec <-----
A 3.0-kg cylinder falls vertically from rest in a very tall, evacuated tube near the surface...
28. A rock falls freely from rest near the surface of a planet where the acceleration due to gravity is 4.0 meters per second. What is the speed of this rock after it falls 32 meters? (1) 8.0 m/s (2) 16 m/s (3) 25 m/s (4) 32 m/s
A magnet of mass 0.10 kg is dropped from rest and falls vertically through a 20.0 cm copper tube. Eddy currents are induced, causing the copper to warm up. The speed of the magnet as it emerges from the tube is 1.40 m/s. How much heat energy is dissipated to the environment?
a small object is released from rest and falls 1.00 * 10^2 feet near the surface of the earth. neglect air resistance. how long will it take to fall through the 1.00 * 10^2 feet mentioned? a) 4.5 s b) 10 s c) 2.49 s d) 3.12 s e) 6.25 s
P3. A rocket of mass -1.20x10'kg is launched vertically upward from point A on the earth's surface with an initial speed v, 7.00km/s a. (12) Calculate the maximum height H of point B above the earth's surface at which the rocket will momentarily come to rest, before it starts falling back to the earth Hint: Use conservation of energy. b. (4) Determine the gravitational acceleration a at point B. c. (9) Calculate the total mechanical energy E of the rocket....
7. AS kg ball is initially at rest on a horizontal frictionless surface as shown to the right. A hard plastic cube of mass 0.5 kg slides across the surface at a speed of 26 ms and strikes the ball The figure below shows a graph of the force exerted on the ball by the cube as a function of time. Oslo Force (x10'N) 10 2.0 10.0 4.0 6.0 8.0 Time (x10's) A) Determine the total impulse given to the...
PLEASE EXPLAIN ALL ANSWERS 3 kg vertically cing is 10 kg g is used to frictionless maximum these ag is most 11. Three blocks, A, B, and C. of masses 1, 2, and 3 kg, respectively, are initially at rest on a frictionless surface as indicated in the figure above. What force has to be applied on block C 5= 200 mis? to accelerate the three blocks at 2 m/s? (A) 0.33 N (2) +22) 4362) 16 V=20mis (B) 1.5...
A child pulls a wagon at a constant velocity along a level sidewalk. The child does this by a 22-newton force to the inclined at 35° to the s n handle, which is k as shown below 35° Level sidewalk What is the magnitude of the force of friction on the wagon? (3) 18 N (4) 22 N (2) 13 N The graph below shows the relationship between the speed and elapsed time for an object falling freely from rest...
A solid cylinder of radius 10 cm and mass 13 kg starts from rest and rolls without slipping a distance of 6.0 m down a house roof that is inclined at 30°. (See the figure.) What is the angular speed of the cylinder about its center as it leaves the house roof? The outside wall of the house is 5 m high. How far from the edge of the roof does the cylinder hit the level ground?
A 1.0 kg box starts from rest and slides down a very rough inclined plane as shown below. Use energy principles to determine the coefficient of friction on the incline surface if its speed at the bottom is 2.78 m/s. The box sits on a incline that is 0.5m above the ground on a 30 degree incline.
help with part 5 1. A 125-kg load is lifted 12.0 m vertically with an acceleration a -0.32g by a single cable. Determine: (a) the tension in the cable, (b) the net work done on the load, (c) the work done by the cable on the load, (d) the work done by gravity on the load, and (e) the final speed of the load assuming it started from rest. 2. A 1.60-m tall person lifts a 2.10-kg book from the...