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Physics 101 Mechanics
November 2021
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Physics 101 Mechanics Q&A Archive of November 11, 2021

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November 11 of 2021

A wad of sticky clay with mass m and velocity v S i is fired at a solid cylinder of mass M and radius R (Fig. P11.39). The cylinder is initially at rest and is mounted on a fixed horizontal axle that runs through its center of mass. The line of motion of the projectile is perpendicular to the…

Help please

Objects moving along a circular path have a centripetal acceleration provided by a net force directed toward the center. Identify the force(s) providing the centripetal acceleration in each of these cases: a planet in circular orbit around its sun; a car going around an unbanked, circular turn;…

Express the force as a single vector at an angle

Find the weight, the magnitude of cable B, and the reaction at A

Find the moment of P about a joining line from the points A and G

Find AC, AD, and the weight of the container

Xiao Zhao is blind, the bus has always been free, but none of the drivers believe he has a disability. Once, ma in Nanjing Zhenjiang road bus station to take no. 72 to Dongbao Road, just get on the bus, the driver continued to use a small speaker to appeal "please consciously pay the…

A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m3 in 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, how much electric power is consumed by the pump?

plese solve

Three resistors 2 ?, 4 ? and 5 ? are combined in parallel. What is the total resistance of the combination?

A silver wire has a resistance of 2.1 ? at 27.5 °C, and a resistance of 2.7 ? at 100 °C. Determine the temperature coefficient of resistivity of silver.

Duive probiems A ball thrown horizontally from the top of a building 55 m high strikes the ground at a point 35 m from the building: What is the (a) time t0 reach the ground, (b) the initial speed of the ball, and (c) the velocity by which the ball will strike the ground?

Duive probiems A ball thrown horizontally from the top of a building 55 m high strikes the ground at a point 35 m from the building: What is the (a) time t0 reach the ground, (b) the initial speed of the ball, and (c) the velocity by which the ball will strike the ground? The catapult Is used…

Define the term electric dipole moment of a dipole. State its S.I. unit

Three capacitors each of capacitance 9 pF are connected in series. What is the total capacitance of the combination?

In the figure, if mA = 1.50 kg, mB = 1.50 kg and θ = 34.0°, what will be the magnitude of the acceleration of the system?

The wheel of a bicycle is rotating from rest at a constant rate of 4.7rad/s2. How much is the increase in angular velocity (in rpm) every minute?

The volume of an ideal gas is held constant. Determine the ratio P2 /P1 of the final pressure to the initial pressure when the temperature of the gas rises (a) from 35.0 to 70.0 K and (b) from 35.0 to 70.0 oC.

what is molarity

You have just gotten a pendulum clock as a gift. The pendulum consists of a disk whose center is firmly attached to the end of a solid rod. Both the disk and the rod are made of solid brass. Being a science major, you are interested in precision and wonder whether the difference in the rate at…

You would like to build a brake to stop the wheel in a shorter time interval, but you must determine the coefficient of friction between the rag and the wheel in order to design a better system. You determine that the maximum pressing force your grandmother can sustain for 6.00 s is 60.0 N.

At what altitude above Earth's surface would the gravitational acceleration be 1.50 m/s2? (Take the Earth's radius as 6370 km.)

a 0.015 kg ball is hot from the plunger of a pinball machine. Because of the centripetal force of 0.028 N, the ball follows a circular arc whose radius is 0.25m. What is the speed of the ball ?

Mars has two moons, each much smaller than the earth’s moon. The smaller of these two bodies, Deimos, isn’t quite spherical, but we can model it as a sphere of radius 6.3 km. Its mass is 1.8 * 1015 kg. At what speed would a projectile move in a very low orbit around Deimos?

You are seated in your physics class next to another student 0.60 m away. Estimate the magnitude of the gravitational force between you. Assume that you each have a mass of 65 kg.

6). A motorcyclist in the Globe of Death, pictured here, rides in a 2.2-m-radius vertical loop. To keep control of the bike, the rider wants the normal force on his tires at the top of the loop to equal or exceed his and the bike’s combined weight. What is the minimum speed at which the rider…

What is the maximum speed with which a 1500 kg car can make a turn around a curve of radius 20 m on a level (unbanked) road without sliding? (This radius turn is about what you might expect at a major intersection in a city.)

Help please

Objects moving along a circular path have a centripetal acceleration provided by a net force directed toward the center. Identify the force(s) providing the centripetal acceleration in each of these cases: a planet in circular orbit around its sun; a car going around an unbanked, circular turn;…

Express the force as a single vector at an angle

Find the weight, the magnitude of cable B, and the reaction at A

Find AC, AD, and the weight of the container

Xiao Zhao is blind, the bus has always been free, but none of the drivers believe he has a disability. Once, ma in Nanjing Zhenjiang road bus station to take no. 72 to Dongbao Road, just get on the bus, the driver continued to use a small speaker to appeal "please consciously pay the…

A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m3 in 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, how much electric power is consumed by the pump?

plese solve

Three resistors 2 ?, 4 ? and 5 ? are combined in parallel. What is the total resistance of the combination?

A silver wire has a resistance of 2.1 ? at 27.5 °C, and a resistance of 2.7 ? at 100 °C. Determine the temperature coefficient of resistivity of silver.

Duive probiems A ball thrown horizontally from the top of a building 55 m high strikes the ground at a point 35 m from the building: What is the (a) time t0 reach the ground, (b) the initial speed of the ball, and (c) the velocity by which the ball will strike the ground?

Duive probiems A ball thrown horizontally from the top of a building 55 m high strikes the ground at a point 35 m from the building: What is the (a) time t0 reach the ground, (b) the initial speed of the ball, and (c) the velocity by which the ball will strike the ground? The catapult Is used…

Define the term electric dipole moment of a dipole. State its S.I. unit

Three capacitors each of capacitance 9 pF are connected in series. What is the total capacitance of the combination?

In the figure, if mA = 1.50 kg, mB = 1.50 kg and θ = 34.0°, what will be the magnitude of the acceleration of the system?

The wheel of a bicycle is rotating from rest at a constant rate of 4.7rad/s2. How much is the increase in angular velocity (in rpm) every minute?

The volume of an ideal gas is held constant. Determine the ratio P2 /P1 of the final pressure to the initial pressure when the temperature of the gas rises (a) from 35.0 to 70.0 K and (b) from 35.0 to 70.0 oC.

what is molarity

You have just gotten a pendulum clock as a gift. The pendulum consists of a disk whose center is firmly attached to the end of a solid rod. Both the disk and the rod are made of solid brass. Being a science major, you are interested in precision and wonder whether the difference in the rate at…

You would like to build a brake to stop the wheel in a shorter time interval, but you must determine the coefficient of friction between the rag and the wheel in order to design a better system. You determine that the maximum pressing force your grandmother can sustain for 6.00 s is 60.0 N.

At what altitude above Earth's surface would the gravitational acceleration be 1.50 m/s2? (Take the Earth's radius as 6370 km.)

a 0.015 kg ball is hot from the plunger of a pinball machine. Because of the centripetal force of 0.028 N, the ball follows a circular arc whose radius is 0.25m. What is the speed of the ball ?

Mars has two moons, each much smaller than the earth’s moon. The smaller of these two bodies, Deimos, isn’t quite spherical, but we can model it as a sphere of radius 6.3 km. Its mass is 1.8 * 1015 kg. At what speed would a projectile move in a very low orbit around Deimos?

You are seated in your physics class next to another student 0.60 m away. Estimate the magnitude of the gravitational force between you. Assume that you each have a mass of 65 kg.

6). A motorcyclist in the Globe of Death, pictured here, rides in a 2.2-m-radius vertical loop. To keep control of the bike, the rider wants the normal force on his tires at the top of the loop to equal or exceed his and the bike’s combined weight. What is the minimum speed at which the rider…

What is the maximum speed with which a 1500 kg car can make a turn around a curve of radius 20 m on a level (unbanked) road without sliding? (This radius turn is about what you might expect at a major intersection in a city.)