Physics Answers

object a has a mass of 1.31 kg and object b has a mass of 2.62 kg. use the mass and velocity values to determine the momentum of the objects before and after the collision. enter all values in the table below. finally determine the total momentum of the system before and after the collision and the change in momentum of each individual object

Now that the students know how many trees they will need for each of the abandoned lots, they need to create a budget for purchasing the trees. The trees they want to purchase cost 25 each, and the students are able to raise 50 a week toward this purchase. Write an equation that will solve for t, where t is the amount of time it will take the students to raise the money they need to purchase the trees for all 4 abandoned lots.

A spring-loaded pendulum with a mass of 500 g, elastic coefficient of 0.5 N / cm oscillates in the lips

The field has a drag coefficient of 0.5 kg / s.

a. Determine the period and reduce the logarithm of the system.

b. After how long does the energy decrease 90%.

c.People exert a forced force

F= 2cos20πt N

into the system then the equation

oscillation of the generation like?

d. With any frequency of forced external force, the amplitude reaches its maximum value and value equals 4N

A certain dog whistle has a frequency of 35.10 kHz.  A person blows the whistle while riding in the back 

of a sweet Sebring convertible.  With what minimum velocity must the driver go in order for a person standing on the side of the road to hear the whistle as the car drives away? 

[recall that humans can only hear sounds up to 20,000 Hz]

A 10 kg block is moving at 6 m/s, it is slowed to a speed of 2 m/s in 15 s. How much force is required for this to occur?

A projectile is lunched with 30m/s at an angle 60 degree with the horizontal. Find the position of the projectile and the magnitude and direction of its velocity at t=2s

A particle of mass m is attached to the end of a string and moves in a circle of radius r on a frictionless horizontal table. The string passes through a frictionless hole in the table and, initially, the other end is fixed. a) if the string is pulled so that the radius of the circular orbit decreases, how does the angular velocity change if it is ω0 when r = r0? b) what work is done when the particle is pulled slowly in from a radius r0 to a radius r0/2?

A ball thrown 40 degrees angle below the horizontal at 8.0 m/s. After 0.40 seconds the horizontal component of its velocity will be?

particle (charge = +6 nC) is located at the origin (* = 0), and a second particle (charge =+3 nC) is placed on the x axis at x =2 m. What is the electric potential (in V) at a point of x = 3 m? a. 45 b. 20 d. 50 e. 30