69 Answered Questions for the topic physics C

17h

#### Conservation of Energy / Work problem (AP Physics C: Mechanics)

A 150 g particle at x = 0 is moving at 8.00 m/s in the +x-direction. As it moves, it experiences a force given by Fx = (0.750N)sin(x/2.00m).What is the particle's speed when it reaches x=3.14m?

1d

#### Physics, forces-spring problem

A block that weighs 12N is hanging from a spring scale that you are holding. How could you move the apparatus to produce a scale reading of less than 12NA) move the object downward and stop...
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2d

#### Physics, work problem

A mover is pushing a 20-kg box up a 30-degree ramp from the ground into a moving truck.The ramp is 2.1m long. He pushes it without rollers where the coefficient of kinetic friction is 0.3.a) what...
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3d

#### Physics, work problem

A mover is pushing a 20-kg box up a 30-degree ramp from the ground into a moving truck. He pushes with a constant velocity up the 2.1m ramp. He pushes it without rollers where the coefficient of...
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3d

#### Physics, Energy Problems (confused!)

1) a 2000 kg rollercoaster starts from a height of 55 m and an initrial velocity of 8 m/s. When it reaches the bottom of the hill (height of zero), what is its velocity?2) For the rollercoaster...
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7d

#### Physics, energy problems

1) a 2000 kg rollercoaster starts from a height of 55 m and an initrial velocity of 8 m/s. When it reaches the bottom of the hill (height of zero), what is its velocity?2) For the rollercoaster...
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18d

#### dielectric of capacitors

a dielectric with the dielectric constant k=4 is inserted into a parallel plate capacitor, filling 1/3 of the volume. if the capacitance of the capacitor without the dielectric is c whats is the...
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11/11/19

#### Fnet=ma Problems

1) a 500 kg car is travelling at 15 m/s and experiences a forward engine force of 2000N for 3 seconds. The combined frictional forces acting on the car are 600 N. What is the car's acceleration?2)...
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11/10/19

#### Fnet=Fma problems

1) a 500 kg car is travelling at 15 m/s and experiences a forward engine force of 2000N for 3 seconds. The combined frictional forces acting on the car are 600 N. What is the car's acceleration?2)...
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11/05/19

#### Torque required on boat motor to reach velocity

The resistance against a boat is proportional to the velocity. It needs 22 hp to keep the boat moving at 34 km/hr. The boat's engine turns at 2.3 rev/min when the boat is moving at 48 km/hr. What...
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10/25/19

#### Projectile Motion

(Ignore air resistance) A man is riding in the back of a truck (facing forward) that is driving forward at a constant velocity of 30 mph. If he throws a ball straight upward so that it reachers a...
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10/24/19

#### Projectile Motion

1) A rifle is shot horizontally at a speed of 200m/s above flat ground. Compared to a bullet that is dropped at the same instant, the bullet that is shot will:a) take a longer time to reach the...
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10/20/19

#### a 9.50kg hanging object.. PHYSICS HELP

A 9.50-kg hanging object is connected by a light, inextensible cord over a light, frictionless pulley to a 5.00-kg block that is sliding on a flat table. Taking the coefficient of kinetic friction...
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10/18/19

#### Atoy rocket.. PHYSICS HELP

A toy rocket engine is securely fastened to a large puck that can glide with negligible friction over a horizontal surface, taken as the xy plane. The 3.00-kg puck has a velocity of 1.40î m/s at...
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10/07/19

#### PHYSICS - A foreign automobile manufacturer claims that its sports car will accelerate from rest to a speed

A foreign automobile manufacturer claims that its sports car will accelerate from rest to a speed of 45.5 m/s in 7.35 s.(a)Determine the magnitude of the average acceleration of the car (in...
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10/07/19

#### PHYSICS HELP - A ball is thrown upward from the ground with

A ball is thrown upward from the ground with an initial speed of 23.6 m/s; at the same instant, another ball is dropped from a building 18 m high. After how long will the balls be at the same...
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10/07/19

#### PHYSICS HELP - A particle moves along the x axis..

A particle moves along the x axis according to the equation x = 2.08 + 3.01t − 1.00t2, where x is in meters and t is in seconds.(a) Find the position of the particle at t = 3.40 s.(b) Find its...
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09/07/19

#### Metals electric charge

When a metal plate is given a positive charge, which of the following is taking place? a) Protons (positive charges) are transferred to the plate from another object. b) Electrons (negative...
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05/10/19

#### A 1,000-kg vehicle traveling 4 m/s eastward collided with another vehicle, at which point it moved 1 m/s westward.

A 1,000-kg vehicle traveling 4 m/s eastward collided with another vehicle, at which point it moved 1 m/s westward. What was the vehicle's change in momentum? A. 1,000 kg • m/s B. 3,000 kg •...
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05/10/19

#### Which of the following is the best example of Newton's second law?

Which of the following is the best example of Newton's second law?A. A rolling ball comes to a stop because the forces of friction and gravity are acting upon it.B. The acceleration of a skydiver...
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04/08/19

#### Physics car power question

A car is moving at 24.5 m/s and is being pushed by a force of 325 Newtons. How much power is being delivered to the car?

04/08/19

#### Physics bullet question

A bullet has a mass of 20 grams and is traveling at 275 m/s. It passes completely through a wooden block and emerges with a velocity of 130 m/s. If the block is 1.2 kg in mass, what is the...
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