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Physics 101 Mechanics
November 2021
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Physics 101 Mechanics Q&A Archive of November 21, 2021

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November 21 of 2021

Find the equivalent resistance and the voltage in the circuit R1=10.0 R2=17.0 R3=4.00 R4=23.0 I=7.00A

A thin copper wire with a diameter 2.5 mm is connected to a 1.2-V potential difference, a current of 2.0 amps flows through the wire. The resistivity of copper is 1.72 × 10-8 ? ? m. What is the length of the wire?

A person is standing on a painter scaffold. The right hand scale reads a higher value than the left scale is he closer to the left skill or the right hand scale

Two planets have a gravitational force between them at a certain distance. If the distance between the planets doubles, what happens to the gravitational force?

A driven gear of 200 teeth turns at 100 rpm. The driver gears turns at 160 gpm. How many teeth does the driver gear have?

Find the mass, in kg, of an object that is traveling 20 m/s and has 10,000 J of kinetic energy.

A crate weighing 8500 lb is pulled up an inclined plane with a length of 12 meters and a height of 2 meters. The crate is pulled up the inclined plane with a pulley system that has a mechanical advantage of 4. How much effort force, in pounds, is required to pull the crate?

1. A winch has a handle radius of 45 cm and an axle radius of 10 cm. It takes an effort force of 35 Newtons to move a resistance force of 120 Newtons. What is the ideal mechanical advantage? 2. For the winch described in the previous problem, what is the actual mechanical advantage?

A winch has a handle radius of 45 cm and an axle radius of 10 cm. It takes an effort force of 35 Newtons to move a resistance force of 120 Newtons. What is the ideal mechanical advantage?

A jackscrew has an efficiency of 30%. If the actual mechanical advantage of the jackscrew is 70, what is the ideal mechanical advantage?

What is the radius of an automobile tire that makes 1 revolution every 0.1 second and has a speed of 15 m/s?

What is the maximum height above ground a projectile of mass 0.79 kg, launched from ground level, can achieve if you are able to give it an initial speed of 80.3 m/s

Convert 5cm to mm

East, North and up are positive directions. A 493 g toy rocket car, carrying 87.0 g of fuel in its engine, travels with an unknown initial velocity. Its engine is ignited and burns all the fuel; making and ejecting hot gasses that produce an average thrust force of 0.725 N for 3.09 s. When all…

What is the angular frequency of a pendulum of length 12.75 in?

Container has \( 5 \mathrm{~kg} \) of \( \left(\mathrm{N}_{2}\right) \) gas at \( 80 \mathrm{kPa}, 1300 \mathrm{~K} \) that is heated to \( 1600 \mathrm{~K} \). Solve for the heat transfer using a. the heat capacity \( 0.653 \mathrm{kj} / \mathrm{kg} \mathrm{k} \) \( .…

consider an electrron whose spin direction located in the xy plane find the egin value of the electron spin operter s

Convert 5cm to mm

A particle initially located at the origin has an acceleration of a = 3.00ˆ j m / s 2 and an initial velocity of vi= 5.00ˆ i m / s . Find (a) the vector position and velocity at any time t and (b) the coordinates and speed of the particle at t = 2.00 s.

If two ends of the rope in equilibrium are pulled with forces of equal magnitude and opposite direction, why is the total tension in the rope not zero?

Please explain how to solve this!

Please explain how to solve this.

1.35 kgm ^-3

Ans: a) 2.24 x 10^-2 m^3 b) 0.179 kgm^-3 c) 1.43 kgm^-3

How much work must Denise do to drag her basket of laundry of mass 5.0 kg a distance of 5.0 m along a floor, if the force she exerts is a constant 30.0 N at an angle of 60.0° with the horizontal?

Ans: a) 0.030 b) 1.81 x 10^22 c) 0.83 g

Ans: 1.04 x 10^5 Pa

Ans: 56 g; 0.045 m^3

Ans: a) 1.0 x 10^3 Pa b) 1.2 x 10^22 c. 7.3 x 10 ^-2 m^3

Ans: 10 atm (atmpospheres)

Please explain the following!

Please explain how to solve this!

Find the equivalent resistance and the voltage in the circuit R1=10.0 R2=17.0 R3=4.00 R4=23.0 I=7.00A

A thin copper wire with a diameter 2.5 mm is connected to a 1.2-V potential difference, a current of 2.0 amps flows through the wire. The resistivity of copper is 1.72 × 10-8 ? ? m. What is the length of the wire?

A person is standing on a painter scaffold. The right hand scale reads a higher value than the left scale is he closer to the left skill or the right hand scale

Two planets have a gravitational force between them at a certain distance. If the distance between the planets doubles, what happens to the gravitational force?

A driven gear of 200 teeth turns at 100 rpm. The driver gears turns at 160 gpm. How many teeth does the driver gear have?

Find the mass, in kg, of an object that is traveling 20 m/s and has 10,000 J of kinetic energy.

A crate weighing 8500 lb is pulled up an inclined plane with a length of 12 meters and a height of 2 meters. The crate is pulled up the inclined plane with a pulley system that has a mechanical advantage of 4. How much effort force, in pounds, is required to pull the crate?

1. A winch has a handle radius of 45 cm and an axle radius of 10 cm. It takes an effort force of 35 Newtons to move a resistance force of 120 Newtons. What is the ideal mechanical advantage? 2. For the winch described in the previous problem, what is the actual mechanical advantage?

A winch has a handle radius of 45 cm and an axle radius of 10 cm. It takes an effort force of 35 Newtons to move a resistance force of 120 Newtons. What is the ideal mechanical advantage?

A jackscrew has an efficiency of 30%. If the actual mechanical advantage of the jackscrew is 70, what is the ideal mechanical advantage?

What is the radius of an automobile tire that makes 1 revolution every 0.1 second and has a speed of 15 m/s?

What is the maximum height above ground a projectile of mass 0.79 kg, launched from ground level, can achieve if you are able to give it an initial speed of 80.3 m/s

Convert 5cm to mm

East, North and up are positive directions. A 493 g toy rocket car, carrying 87.0 g of fuel in its engine, travels with an unknown initial velocity. Its engine is ignited and burns all the fuel; making and ejecting hot gasses that produce an average thrust force of 0.725 N for 3.09 s. When all…

What is the angular frequency of a pendulum of length 12.75 in?

Container has \( 5 \mathrm{~kg} \) of \( \left(\mathrm{N}_{2}\right) \) gas at \( 80 \mathrm{kPa}, 1300 \mathrm{~K} \) that is heated to \( 1600 \mathrm{~K} \). Solve for the heat transfer using a. the heat capacity \( 0.653 \mathrm{kj} / \mathrm{kg} \mathrm{k} \) \( .…

consider an electrron whose spin direction located in the xy plane find the egin value of the electron spin operter s

Convert 5cm to mm

A particle initially located at the origin has an acceleration of a = 3.00ˆ j m / s 2 and an initial velocity of vi= 5.00ˆ i m / s . Find (a) the vector position and velocity at any time t and (b) the coordinates and speed of the particle at t = 2.00 s.

If two ends of the rope in equilibrium are pulled with forces of equal magnitude and opposite direction, why is the total tension in the rope not zero?

Please explain how to solve this!

Please explain how to solve this.

1.35 kgm ^-3

Ans: a) 2.24 x 10^-2 m^3 b) 0.179 kgm^-3 c) 1.43 kgm^-3

How much work must Denise do to drag her basket of laundry of mass 5.0 kg a distance of 5.0 m along a floor, if the force she exerts is a constant 30.0 N at an angle of 60.0° with the horizontal?

Ans: a) 0.030 b) 1.81 x 10^22 c) 0.83 g

Ans: 1.04 x 10^5 Pa

Ans: 56 g; 0.045 m^3

Ans: 10 atm (atmpospheres)

Please explain the following!

Please explain how to solve this!