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Problems with solutions
| I.D |
Level |
Problem |
Problem Topic |
| 55 |
High school |
In the figure as shown in "click here", a block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance 'd'. The blocks initial speed v0 is 7.6 m/s; the height difference 'h' is 1 m; . . . continues
Click to Purchase Solution |
Force & Laws of Motion |
| 56 |
High school |
A short 10 gram string is used to pull a 50 gram toy across a frictionless horizontal surface. If a 3.0 x 10 Newton force is applied horizontally to the free end. Find the force of the string in the toy, at the other end. . . . continues
Click to Purchase Solution |
Force & Laws of Motion |
| 57 |
High school |
A 500 kg sack of coal is dropped on a 2000 kg flatcar which was initially moving at 3 m/s as shown. Find the speed of the flatcar after the sack rests on it. . . . continues
Click to Purchase Solution |
Force & Laws of Motion |
| 58 |
High school |
A rocket exhausts fuel with a velocity of 1500 m/s , relative to the rocket. It starts from rest in outer space with fuel comprising 80 % of the total mass. Find its speed when all the fuel has been exhausted. . . . continues
Click to Purchase Solution |
Force & Laws of Motion |
| 59 |
High school |
A 640 N acrobat falls 5.0 m from rest into a net. The net tosses him back up with the same speed he had just before he hit the net. Find the average force exerted on him by the net during this collision. . . . continues
Click to Purchase Solution |
Force & Laws of Motion |
| 60 |
High school |
A 120 lb person is being lifted aloft by a rocket which accelerates uniformly to an upward speed of 300 ft/sec. in 2 sec .
a. What is the upward acceleration in multiples of g?
b. What is apparent weight of the person during acceleration?
. . . continues
Click to Purchase Solution |
Force & Laws of Motion |
| 61 |
High school |
Bock A with a mass of 10 kg , rests on a 30 degree incline , the coefficient of friction is 0.2 . The attached string is parallel to the incline and passes over a massless frictionless pulley at the top . Block B , with a mass of 3.0 kg , is attached to the dangling end of the string. Find the acceleration of the bock B . . . . continues
Click to Purchase Solution |
Force & Laws of Motion |
| 62 |
High school |
Water flows over a water fall which is 54.0 m high at an average rate of 1.10 E+6 kg/s . If all the potential energy of the water were converted into electric energy , how much electrical power could be produced by these falls ? . . . continues
Click to Purchase Solution |
Work,Power & Energy |
| 63 |
High school |
A block of mass m = 6.7 kg is released from rest at a height of H = 3.0 on a curved frictionless ramp. At the foot of the ramp is a spring whose spring constant is k = 372.0 N/m. What is the maximum compression of the spring , x ?
After the spring reaches its maximum compress . . . continues
Click to Purchase Solution |
Work,Power & Energy |
| 64 |
High school |
The string in the Figure is L = 100.0 cm long and the distance d to the fixed peg P is 72.0 cm . when the ball is released from rest in the position shown , It will swing along the dashed arc . How fast will it be going when it reaches the highest point in its swing ? How fast will it be going when it reaches the lowest point in its swing ? . . . continues
Click to Purchase Solution |
Work,Power & Energy |
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