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Get college assignment help at uniessay writers Joe and Jake are in Joe’s apartment and they decide to go to a restaurant for dinner. Joe drives (alone) to the restaurant by going east for 2.3 miles and then north for 6.2 miles. Jake has to first go to his apartment to finish some chores. Jake’s apartment is 1.3 miles from Joe’s along the direction 39 degrees North of East. The roads from Jake’s apartment to the restaurant go either North-South or East-West. If Jake is always driving either North or East, how many miles does Jake drive from his apartment to reach the restaurant? Express your answer to 2 significant figures. ? miles

If the backpack begins to slide when the spring (k =

If the backpack begins to slide when the spring (k = 140 N/m) stretches by 2.40 cm, what is the coefficient of static friction between the backpack and the table? A backpack full of books weighing 58.0 N rests on a table in a physics laboratory classroom. A spring with a force constant of 140 N/m is attached to the backpack and pulled horizontally, as indicated in the figure .

A tugboat exerts a constant force of 7.00 103 N on

A tugboat exerts a constant force of 7.00 103 N on a ship moving at constant speed through a harbor. How much work does the tugboat do on the ship if each moves a distance of 1.00 km?

Two spheres, fastened to “pucks”, are rid-ing on a frictionless airtrack.

Two spheres, fastened to “pucks”, are rid-ing on a frictionless airtrack. Sphere 1 is charged with 2 nC, and sphere 2 is charged with 4 nC. Both objects have the same mass. 1 nC is equal to 1 × 10−9 C.

A river flows due east at 1.29 m/s. A boat crosses

A river flows due east at 1.29 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant veolocity of 11.0 m/s due north relative to the water. If the river is 302 m wide, how far downstream is the boat when it reaches the north shore?

a ball initially at rest rolls down a hill with an

a ball initially at rest rolls down a hill with an acceleration of 3.5 m/s/ if it accelerates for 6.2 s, how far will it move?

A 64 kg woman stands on a very light, rigid board

A 64 kg woman stands on a very light, rigid board that rests on a bathroom scale at each end, as shown in figure. What is the reading on each of the scales?

a .114 kg meter stick is supported at its 38.5 cm

a .114 kg meter stick is supported at its 38.5 cm mark by a string attached to the ceiling. A .68 kg mass hangs vertically from the 4.44 cm mark. A mass is attached somewhere on the meterstick to keep it horizontal and in both rotational and translational equilibrium. The force applied by the string attaching the meter stick to the ceiling is 20.7 N. Find the value of the unknonw mass

A ball of mass 13.3 g is attached to a cord

A ball of mass 13.3 g is attached to a cord of length 0.476 m and rotates in a vertical circle. What is the minimum speed the ball must have at the top of the circle so the cord does not become slack? The acceleration of gravity is 9.8 m/s2 . Answer in units of m/s.

A ball of mass m moving at speed v0 collides head

A ball of mass m moving at speed v0 collides head on with a stationary ball of mass 5m. If the collision is completely inelastic, what is the ratio Kf/Ki of the kinetic energies of the balls before and after the collision?

a potters wheel haveing a radius of 0.50 m anda a

Get college assignment help at uniessay writers a potters wheel haveing a radius of 0.50 m anda a moment of inertia of 12 kg m is rotating freely at 50 rec/min. The potter can stop the wheel in 6.0 s by pressing a wet rag against the rim and exerting a radially inward force of 70 N. Find the effective coefficient of kinetic friction between the wheel and the wet rag.

Two packing crates of masses m1 = 10.0 kg and m2

Two packing crates of masses m1 = 10.0 kg and m2 = 6.50 kg are connected by a light string that passes over a frictionless pulley as in Figure P4.26. The 6.50 kg crate lies on a smooth incline of angle 39.0°. Find the acceleration of the 6.50 kg crate.

two objects attract each other gravitationally witha force of 2.5 x

two objects attract each other gravitationally witha force of 2.5 x 10^-10 N when they are .25 m apart. Their total mass is 4.0 kg. Find their individual masses

Two friends, Al and Jo, have a combined mass of 196

Two friends, Al and Jo, have a combined mass of 196 kg. At the ice skating rink, they stand close together on skates, at rest and facing each other. Using their arms, they push on each other for 1 second and move off in opposite directions. Al moves off with a speed of 9.7 m/sec in one direction and Jo moves off with a speed of 8.6 m/sec in the other. You can assume friction is negligible.

A river flows due east at 1.30 m/s. A boat crosses

A river flows due east at 1.30 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 9.2 m/s due north relative to the water. (a) What is the velocity of the boat as viewed by an observer on the shore? m/s at ° east of north (b) If the river is 358 m wide, how far downstream is the boat when it reaches the north shore? m

Sam, whose mass is 69 kg, takes off across level snow

Sam, whose mass is 69 kg, takes off across level snow in his jet powered skis. The skis have a thrust of 207 N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 11 s.

A(n) 0.5 kg softball is pitched at a speed of 19

A(n) 0.5 kg softball is pitched at a speed of 19 m/s. The batter hits it back directly at the pitcher at a speed of 24 m/s. The bat acts on the ball for 0.015 s. What is the magnitude of the impulse im- parted by the bat to the ball? Answer in units of N · s.

A small block of mass 67 g is released from rest

A small block of mass 67 g is released from rest at the top of a curved frictionless wedge of mass 304 g which sits on a frictionless horizontal surface as shown. The acceleration due to gravity is 9.81 m/s2. Right is the positive direction. When the block leaves the wedge, its veloc- ity is 3.32 m/s to the right. What is the velocity vb of the wedge after the block reaches the horizontal surface? Answer in units of m/s.

A race car has a mass of 701 kg. It starts

A race car has a mass of 701 kg. It starts from rest and travels 41.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?

A flight attendant pulls her 70.0 N flight bag a distance

A flight attendant pulls her 70.0 N flight bag a distance of 267 m along a level airport floor at a constant speed. The force she exerts is 38.0 N at an angle of 52.0° above the horizontal. (a) Find the work she does on the flight bag. J (b) Find the work done by the force of friction on the flight bag. J (c) Find the coefficient of kinetic friction between the flight bag and the floor.

Joe’s boat leaves the harbor and heads straight for Treasure Island,

Joe’s boat leaves the harbor and heads straight for Treasure Island, which is 39 degrees North of West. Joe travels 23 km to reach the island. Moe leaves a little while later and first heads North to try and get a glimpse of some dolphins (that had earlier been sighted by her friends). Moe travels 11 km due North. At this point she is disappointed at having seen no dolphins and heads straight for Treasure Island. What is the total distance Moe travels from the harbor to the island? Express your answer to 2 significant figures. ? km

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