Physics Answers

The guitar string wire in item 2 was 1.60 m long with a diameter of 0.20 cm. Approximately what tension force would break it?

What is the total charge on an infinite wire carring a charge density

λ =

1

|x|+α where α is a cosntant.

a volleyball player serves the ball at 1.5m height and horizontally with 0.3m, what is the time of flight of the ball and its horizontal velocity

Determine the resultant of two vectors using the component method and illustrate. Use separate sheet of paper and scientific calculator.

Given: A= 15 Units, 25 Counterclockwise (+) x-axis

B = 30 Units, 40 Counterclockwise (-) x-axis

Two vectors are given: 7 = 3 + 27, y = 27 - 8j.

a) Draw these vectors in Cartesian coordinate system

b) Represent both of these vectors in magnitude, direction notation.

C) Represent vector 27 + 3ÿ in magnitude, direction notation.

Figure a side shows a box of mass m2 = 1.0 kg on a frictionless plane inclined at angle ©= 30°. It is connected by a cord of negligible mass to a box of mass ml = 3.0 kg on a horizontal frictionless surface. The pulley is frictionless and massless.

If the magnitude of horizontal force is 2.3 N.

what is the tension in the connecting cord?

What is the largest value the magnitude of may have without the cord becoming

slack?

 A car moves along an r axis through a distance of 900 m, starting at rest (at r = 0) and

ending at rest (at r=900 m). Through the first ¼ of that distance, its acceleration is +2.25 m/s2. Through

the rest of that distance, its acceleration is -0.750 m/s2. What are:

its travel time through the 900 m and

its maximum speed?

Graph position r versus time 1 for the trip,

Graph velocity y versus time 1 for the trip, and

Graph acceleration a versus time 1 for the trip.

A rectangular loop of wire is ℓ

ℓ = 800 mm

mm long and w

w= 500mm

mmwide. You bend the ℓ

ℓ sides into a semicircle while keeping the w

w sides straight, as shown in (Figure 1), and then move the curved loop at speed v

vv= 0.900m/s

m/s into a uniform magnetic field of magnitude B

BB= 0.600T

T. One of the sides labeled w

w is the leading edge of the moving loop, and the magnetic field direction is perpendicular to the plane CDEF What is the value of the emf induced in the loop?

A sailboat tacking against the wind moves as follows: 4.2 km at 33° east of north, 3.6 km at 26° west of north, and 3.8 km at 41° east of north. The entire trip takes 1 h and 25 min. What is the displacement of the sailboat at the end of the trip?

A 1500 g object is being pushed by an applied force and accelerates at 4.08 m/s2. what is the force applied if a frictional force is 62.5 n is acting on opposite direction?