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Get college assignment help at uniessay writers A 4.50 object initially at rest at the origin is subjected to the time-varying force shown in the figure . What is the object’s velocity at t=6 s?

A raft is made of 10 logs lashed together. Each is

A raft is made of 10 logs lashed together. Each is 56 cm in diameter and has a length of 6.1 m. How many people can the raft hold before they start getting their feet wet, assuming the average person has a mass of 68 kg? Do not neglect the weight of the logs. Assume the density of wood is 600kg/m3

A box of mass 11 kg is at rest on a

A box of mass 11 kg is at rest on a horizontal frictionless surface. A constant horizontal force then acts on the box, and accelerates it to the right. It is observed that it takes the box 6.5 seconds to travel 82 meters. What is the magnitude of the force?

50.0 g ball of clay traveling east at 8.00 m/s collides

50.0 g ball of clay traveling east at 8.00 m/s collides and sticks together with a 60.0 g ball of clay traveling north at 7.00 m/s.What is the speed of the resulting ball of clay

A spool of thin wire (with inner radius r = 0.50

A spool of thin wire (with inner radius r = 0.50 m, outer radius R = 0.65 m, and moment of inertia I_cm = 1.1323 kg*m2) pivots on a shaft. The wire is pulled down by a mass M = 1.450 kg. After falling a distance D = 0.560 m, starting from rest, the mass has a speed of v = 73.8 cm/s. Calculate the energy lost to friction during that time.

1)Atwood’s Machine a) If we use an Atwood’s machine, Calculate the

1)Atwood’s Machine a) If we use an Atwood’s machine, Calculate the acceleration and the the net force in each case. Write all the equations you need for the calculations. (m2 – m1)g a = —————————— m1 m2 Part 1. m1 = 160 g m2 = 240 g a = 1.96 m/s Part 2. m1 = 140 g m2 = 360 g a = 4.3 m/s b) If the sum of the two masses is 0.5 kg and the net force that move the machine is 1 N, Which are the two masses and the acceleration? 2)Force Table a) Calculate the forces that acting at 60° and 135° equilibrate one of 196 N at 270°. Show al the procedure needed for the calculation. Draw a sketch of the forces. b) If we have a force of 196 N acting at 270° and it is equilibrate with one (F1) of 98 acting at 60° and another one (F2) actig at 150°, calculate F2. Show al the procedure needed for the calculation. Draw a sketch of the forces. 3)Friction Coefficient a) Calculate the angle at which a block of mass 2kg would slide, if the static friction coefficient for the two surfaces is 0.6. b) If the mass were 1kg, which is the angle for sliding. c) Calculate the friction force in both cases.

a golfer can hit a golf ball a horizontal didstance of

a golfer can hit a golf ball a horizontal didstance of over 300m on a good drive. What maximum height will a 301.5m drive reach if it is launched at an angle of 25 to the ground

onsider the circuit in the drawing.(R1 = 4.0 , R2 =

onsider the circuit in the drawing.(R1 = 4.0 , R2 = 36 , V1 = 30.0 V.) Determine (a) the magnitude of the current in the circuit and A (b) the magnitude of the voltage between the points labeled A and B. V

Three capacitors (4.0, 6.0, and 13.0 µF) are connected in series

Three capacitors (4.0, 6.0, and 13.0 µF) are connected in series across a 50.0-V battery. Find the voltage across the 4.0-µF capacitor. V

A ski starts from rest and slides down a 22° incline

A ski starts from rest and slides down a 22° incline 75 m long. If the coefficient of friction is 0.090, what is the ski’s speed at the base of the incline? If there is snow level at the foot of the incline and it has the same coefficient of friction, how far will the ski travel along the level?

Two pulley wheels, of respective radii R1 = 0.33 m and

Get college assignment help at uniessay writers Two pulley wheels, of respective radii R1 = 0.33 m and R2 = 1.4 m are mounted rigidly on a common axle and clamped together. The combined moment of inertia of the two wheels is I 1.5 kgm2. Mass m1 = 12 kg is attached to a cord wrapped around the first wheel, and another mass m2 = 4.7 kg is attached to another cord wrapped around the second wheel: Find the angular acceleration of the system. Take clockwise direction as positive. The acceleration of gravity is 9.8 m/s2 . Answer in units of rad/s2

Four objects are situated along the x axis as follows: a

Four objects are situated along the x axis as follows: a 1.7-kg object is at -0.9m, a 1.6-kg object is at 0.2m, a 2.4-kg object is at the origin, and a 2.5-kg object is at -1.1m. Where is the center of mass of the sistem formed by these four objects?

The 6.0 kg object below is released from rest at a

The 6.0 kg object below is released from rest at a height of 5.0 m on a curved frictionless ramp. At the foot of the ramp is a spring of force constant k = 450 N/m. The object slides down the ramp and into the spring, compressing it a distance x before coming momentarily to rest. FIND X IN METERS

A 100-m-long train accelerates uniformly from rest. If the front of

A 100-m-long train accelerates uniformly from rest. If the front of the train passes a railway worker 166 m down the track at a speed of 21 m/s, what will be the speed of the last car as it passes the worker?

A player bounces a 0.47 kg soccer ball off her head,

A player bounces a 0.47 kg soccer ball off her head, changing the velocity of the ball from i = (9.2 m/s) (-2.7 m/s) to f = (6.1 m/s) (5.5 m/s). The ball is in contact with the player’s head for 6.7 ms. (a) What is the directon of the impulse delivered to the ball? (b) What is the magnitude of the impulse delivered to the ball?

A 14 g ball of clay traveling east at 3.0 m/s

A 14 g ball of clay traveling east at 3.0 m/s collides with a 30 g ball of clay traveling north at 2.0 m/s. What are the speed and the direction of the resulting 44 g ball of clay?

A projectile is fired at an upward angle of 45° from

A projectile is fired at an upward angle of 45° from the top of a 277 m cliff with a speed of 216 m/s. What will be its speed when it strikes the ground below? (Use conservation of energy.)

A projectile is fired at an upward angle of 45° from

A projectile is fired at an upward angle of 45° from the top of a 287 m cliff with a speed of 206 m/s. What will be its speed when it strikes the ground below?

25.6 kg rocket accelerates upward at 105 m/s2. What is the

25.6 kg rocket accelerates upward at 105 m/s2. What is the thrust pushing it up?

A spring with 49 N/m hangs vertically next to a ruler.

A spring with 49 N/m hangs vertically next to a ruler. The end of the spring is next to the 17-{rm cm} mark on the ruler.If a 2.0-{rm kg} mass is now attached to the end of the spring, where will the end of the spring line up with the ruler marks?

A bat flies toward a wall, emitting a steady sound of

A bat flies toward a wall, emitting a steady sound of frequency 2.00 rm kHz. This bat hears its own sound plus the sound reflected by the wall. How fast should the bat fly in order to hear a beat frequency of 10.0 rm Hz? Express your answer using two significant figures. Take the speed of sound to be 344 rm m/s.

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