11/15/20

Three horizontal forces are pulling on a ring, at rest. F1 is 100 N at a 45.0° angle, and F2 is 135 N at a 160° direction. What is the y-component of F3?
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11/12/20

Trignomoetric Functions
Find a possible formula of the form A sin x+ k or B cos x + k for the trigonometric function whose values are in the following table: x 0, π/2, πg(x) 3.5, 0.8 , −1.9
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11/11/20

what factor does the amount of mechanical energy stored in the spring change?
A spring is stretched by an initial amount from its relaxed state. If the spring is then stretched by three times that amount from its relaxed state, by what factor does the amount of mechanical... more
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11/11/20

Compute how much kinetic energy was "lost" in this inelastic collision.
A 9,100-kg truck runs into the rear of a 1,000-kg car that was stationary. The truck and car are locked together after the collision and move with speed 8 m/s. Compute how much kinetic energy was... more
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11/11/20

Which ball is subjected to the greater magnitude of impulse during its collision with the floor?
Two equal mass balls (one red and the other green) are dropped from the same height, and rebound off the floor. The red ball rebounds to a higher position. Which ball is subjected to the greater... more
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11/10/20

Machine A can assemble a product in 9 hours while machine B can assemble the same product in 7 hours. How long (in hr) does it take to assemble the product if both machines work together?

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11/10/20

physics question?
An object is projected upward with a 30° launch angle from the ground and an initial speed of 60 m/s. For how many seconds will it be in the air? How far will it travel horizontally? Assume it... more
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11/10/20

Related rates question
A trough is 12 feet long and 3 feet across the top (see figure). Its ends are isosceles triangles with altitudes of 3 feet.(a) If water is being pumped into the trough at 2 cubic feet per minute,... more
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11/10/20

Related Rates question
At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 2 cubic feet per minute. The diameter of the base of the cone is approximately three times the... more
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11/09/20

Optimization question
A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder. The total volume of the solid is 10 cubic centimeters. Find the radius of the cylinder that produces the... more
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11/08/20

help me in physics
An 2 kg wooden block slides across a horizontal wooden floor at constant velocity.What is the magnitude of the force of kinetic friction between the block and the floor?
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11/08/20

A car's storage battery is being charged at a rate of 75 W. If the potential difference across the batteries terminal is 13.6 V, charge is being transferred between its plates at
A car's storage battery is being charged at a rate of 75 W. If the potential difference across the batteries terminal is 13.6 V, charge is being transferred between its plates at
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11/07/20

A woman climbs a ladder against the side of the building and wants to climb 3/4 of the way to the end of the ladder.

What is the minimum coefficient of friction needed to keep the ladder from sliding out from under her? The mass of the ladder is 14.5 kg, and its length is 7.47 m, the mass of the woman is 41.3 kg,... more
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11/06/20

What is the length of the path along the graph
What is the length of the path along the graph of  between x = 2 and x = 4? (4 points)answer choices
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11/05/20

a train leaves houston and travels north at 65 km/h. Aftwr it travels 150 km, it turns left and travels 60 km towards the weat at 55 km/h. what was the trains average speed answer
a train leaves houston and travels north at 65 km/h. After it travels 150 km, it turns left and travels 60 km towards the weat at 55 km/h. what was the trains average speed answer
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11/04/20

A driver applies the brakes producing a constant deceleration of 18 feet per second. The car travels 100ft before stopping.
How fast was the car going when the driver hit the brakes
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11/04/20

Magnitude of potential difference
A small object of mass 2.92 g and charge 10.5 uC is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground created by two plates separated by... more
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11/02/20

Please help me thank you!
A 1.98-kg particle has a velocity (2.01 î − 3.05 ĵ) m/s, and a 3.01-kg particle has a velocity (0.94 î + 5.93 ĵ) m/s.(a) Find the velocity of the center of mass. ______ î +  ____ ĵ m/s(b) Find the... more
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11/02/20

How would I solve for part 2?

Consider a lifeguard at a circular pool with diameter 43 meters. The lifeguard, at position AA, must reach someone who is drowning on the exact opposite side of the pool, at position CC. The... more
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11/01/20

Solve the following problem and then upload it. A horse pulls a cart up a hill at an angle of 53 degrees. The horse pulls with a force of 2200 N parallel to the ground. The cart has a mass of 1340 kg.
Solve the following problem and then upload it. A horse pulls a cart up a hill at an angle of 53 degrees. The horse pulls with a force of 2200 N parallel to the ground. The cart has a mass of 1340... more
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11/01/20

How can I solve this?
Starting from rest, a 62.0 kg woman jumps down to the floor from a height of 0.640 m, and immediately jumps back up into the air. While she is in contact with the ground during the time interval 0... more
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11/01/20

Physics Finding the Tension

A 5-kg mass hangs at the end of a cord. Find the tension in the cord if the cord is accelerated at a) 1.7 m/s^2 up b) 1.3 m/s^2 down.
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10/31/20

Dynamic fluids question
The mass in a mass-spring system is pulled 0.03102 m to the right of equilibrium and released. If the spring constant is 36.3 N/m and the mass is 0.402 kg, write a formula for the acceleration of... more
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10/31/20

Physics Open-Ended Question
The slingshot ride at Great Adventure shoots people straight up vertically into the air. If the left side of the slingshot pulls on the rider with a force of 30,000 N at 30 degrees from the... more
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10/31/20

How do I calculate the instantaneous voltage?
A sine wave voltage has a maximum value of 12 V and a frequency of 80 Hz. Calculate the instantaneous voltage at 10 ms. It's a multiple choice question and the following choices are:A. -11.4 VB. 0... more
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