Other Physics Answers

A 12N object is attached vertically by a string to a frictionless car that runs along a level track. The car with mass (m) kg covers a distance of 1.25m in 5s after it starts from rest. a)Find the final speed of the car. b)Find the loss in potential energy of 12 N object in falling through distance of 1.25m c) Gain in kinetic energy of the car and the hanging object. d)Mass of the car

A grocery is pulled along a rough horizontal surface of 6.0 N. It moves through a distance of 7.0 m at a constant speed. a)How much work is carried out by this force? b)How much work is carried out by friction? c)Find the total work done on the cart?

a car starts from rest and accelerates uniformly at 8 m per second square until it attains a maximum velocity of 80 m per second squared as it continues with this speed for 400 seconds until it is brought to rest for under 25 seconds using a vt graph find the total distance traveled

An object explodes and its sound wave propagates through the sea where the temperature is 37 C. It also propagates through air with a 30°C temperature. What will be the difference in the arrival time between the two signals at a station that in 75 km away? (bulk modulus of seawater - 3x10 N/m: seawater density-1245 kg/m³; molar mass of air is .049 kg)

If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 54 cm x 31 cm x 22 cm, what would its mass be?

Write the Given, Required and Solution Express your final answer

in proper significant figure.

A 4.5 kg dog stands on an 18 kg flatboat at dis-

tance D ! 6.1 m from the shore. It

walks 2.4 m along the boat toward

shore and then stops. Assuming no

friction between the boat and the wa-

ter, find how far the dog is then from

the shore.

A tube 1.20 m long is closed at one end. A stretched wire

is placed near the open end. The wire is 0.330 m long and has a

mass of 9.60 g. It is fixed at both ends and oscillates in its funda-

mental mode. By resonance, it sets the air column in the tube into

oscillation at that column’s fundamental frequency. Find (a) that

frequency and (b) the tension in the wire.

Two springs are

joined and connected to a block of

mass 0.245 kg that is set oscillating

over a frictionless floor. The springs

each have spring constant k $

6430 N/m. What is the frequency of

the oscillations?

Trying to get his car out of mud, a man ties one

end of a rope around the front bumper and the other end tightly

around a utility pole 18 m away. He then pushes sideways on the

rope at its midpoint with a force of 550 N, displacing the center of

the rope 0.30 m, but the car barely moves.What is the magnitude of

the force on the car from the rope? (The rope stretches somewhat.)

The focal point of a hyperopic eye is [Best

answer]

(A) on the retina.

(B) behind the retina.

(C) on the fovea.

(D) in front of the retina.