Question

The mobile in the figure (Figure 1) is in equlibrium. Object B has mass of 0.605kg.

Determine the masses of object A, C, and D (neglect the weights of the crossbars)

Answer #1

mD * L5 = mC * L6

mD * 17.50 = mC * 5

mC = 3.50 * mD ----------(1)

For equilibrium of the crossbar to which B is attached,

(mC + mD) * L3 = mB * L4

(mC + mD) * 15 = 0.735 * 5

mC + mD = 0.245 -----------------(2)

From equations (1) and (2),

3.50 mD + mD = 0.245

4.50 mD = 0.245

mD = 0.245/4.50 = 0.0544 kg

From equations (1), mC = 3.50 * 0.0544 = 0.191 kg

For the equilibrium of the crossbar to which A is attached,

mA * L1 = (mB + mC + mD) * L2

mA * 30 = (0.735 + 0.191 + 0.0544) * 7.50

mA = 0.245 kg

Ans: mass of A = 0.245 kg, mass of C = 0.191 kg, mass of D = 0.0544
kg

The mobile in the figure(Figure 1) is in equilibrium. Object B
has mass of 0.585 kg .
Determine the masses of objects A, C, and D. (Neglect the
weights of the crossbars.)

Object A has a mass of 1.1 kg and another object, object B has a
mass of 7.7 kg. Object A and object B are spaced 8
meters apart. Where is the center of mass of this two
object system?
a. 1.0 meter away from object A
b.1/4 of the total distance away from object B
c.Someplace close to object A
d.1.0 meter away from object B

9. Object #1 has mass m; object #2 has mass 10m. They
are separated by the distance d. We can conclude that:
Object 1 exerts greater gravitational force on object 2, than
object 2 exerts on 1.
Object 1 exerts smaller gravitational force on object 2, than
object 2 exerts on 1.
Object 1 exerts on object 2 gravitational force equal in
magnitude to force eqerted by 2 on 1.
Our answer depends on distance d.
10. Consider two objects:...

In the figure below, the hanging object has a mass of
m1 = 0.370 kg; the sliding block has a mass of
m2 = 0.900 kg; and the pulley is a hollow
cylinder with a mass of M = 0.350 kg, an inner radius of
R1 = 0.020 0 m, and an outer radius of
R2 = 0.030 0 m. Assume the mass of the spokes
is negligible. The coefficient of kinetic friction between the
block and the horizontal surface...

The figure below shows an object of mass m=3.7 kg which is
connected to a string of length r=0.96 m. When the object is at the
bottom of the circle it has velocity vb =11.6 m/s. What is the
tension in the string at the top of the circle?

Two objects are at rest on a frictionless surface. Object 1 has
a greater mass than object 2. When a force is applied to object 1,
it accelerates for a time interval ∆t. The force is removed from
object 1 and is applied to object 2. After object 2 has accelerated
for the same time interval ∆t, which statements are true?
(a) p1 < p2
(b) p1 = p2
(c) p1 > p2
(d) KE1 < KE2
(e) KE1 =...

An object with a mass of m = 5.5 kg is attached to the free end
of a light string wrapped around a reel of radius R = 0.260 m and
mass of M = 3.00 kg. The reel is a solid disk, free to rotate in a
vertical plane about the horizontal axis passing through its center
as shown in the figure below. The suspended object is released from
rest 6.40 m above the floor. (a) Determine the tension...

There is object-1 of mass m1=2.84kg moving on +x axis with the
velocity of v1=9.62m/s. Object-1 is explode into two segments of
masses m2=1.74 kg and m3=1.10kg. Mass m2 moves in +250 with the
velocity of 3.57m/s. a) Find the x and y-components of velocity of
mass m3 after collision? (4 points) b) Find the velocity component
of x-direction of the center of mass of the two-particle system
after collision. Find the velocity component of y-direction of the
center of...

There is an object-1 of mass m1=1.84kg moving on +x-axis with
the velocity of v1=7.62m/s. Object-1 is explode into two segments
of masses m2=0.74 kg and m3=1.10kg. Mass m2 moves in +28 degrees
direction on xy plane with the velocity of 1.57m/s.
a) Find the x and y-components of velocity of mass m3 after
collision? [Hint: you can assume the direction of m3 in any
direction on xy plane with velocity components]
b) Find the velocity component of x-direction of...

1) Consider an object of mass m1 =
0.425 kg moving with a uniform speed of 6.65 m/s on a frictionless
surface. This object makes an elastic head-on collision with
another object of mass m2 = 0.555
kg which is initially at rest. (a) Find the speed of
m1 immediately after collision. (b)
Find the speed of m2 immediately after
collision.
2) An object of mass m1 = 0.395
kg starts from rest at point and slides down
an incline surface that makes...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 37 minutes ago

asked 48 minutes ago

asked 58 minutes ago

asked 58 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago