Question

Two blocks of masses m1 = 4.64 kg and m2 = 7.01 kg are placed on a frictionless horizontal surface. A light spring is placed between the blocks and the blocks are pushed together with the spring between them and released. m1 kg moves to the right with a speed of 7.4 m/s. Determine the speed of the other mass. (Hint: Momentum is conserved!)

Answer #1

From conservation of momentum, initial momentum is same as the final momentum of the system. In this situation, the initial momentum of the system is zero. The if v1 is the final velocity of mass m1 and v2 is the final velocity of mass m2. since they both move in the opposite directions, the velocity of one of the block is negative let it be v2. So we get

This is the velocity of the block of mass m2.

Two blocks with masses 3.0 kg and 5.0 kg are placed on a
horizontal frictionless surface. A light spring is placed in a
horizontal position between the blocks. The blocks are pushed
together, compressing the spring, and then released from rest.
After contact with the spring ends, the 5.0-kg mass has a speed of
2.0 m/s. How much potential energy was stored in the spring when
the blocks were released?

Two objects of masses
m1 = 0.40 kg
and
m2 = 0.92 kg
are placed on a horizontal frictionless surface and a compressed
spring of force constant
k = 290 N/m
is placed between them as in figure (a). Neglect the mass of the
spring. The spring is not attached to either object and is
compressed a distance of 9.6 cm. If the objects are released from
rest, find the final velocity of each object as shown in figure
(b)....

Two blocks with masses m1 = 1.10 kg and m2 = 3.50 kg are
connected by a massless string. They are released from rest. The
coefficent of kinetic friction between the upper block and the
surface is 0.440. Assume that the pulley has a negligible mass and
is frictionless, and calculate the speed of the blocks after they
have moved a distance 68.0 cm.

Two blocks of masses m1 = 2.00 kg and m2 =
4.00 kg are released from rest at a height of h = 5.00 m on a
frictionless track as shown to the right. When they meet on the
level portion of the track, they undergo a head-on, elastic
collision. Determine the maximum heights to which m1 and
m2 rise on the curved portion of the track after the
collision.
h1 = m
h2 = m

Two blocks of masses m1 = 1.95 kg and m2 = 3.90 kg are each
released from rest at a height of h = 6.00 m on a frictionless
track, as shown in the figure below, and undergo an elastic head-on
collision. (Let the positive direction point to the right. Indicate
the direction with the sign of your answer.) Two blocks are on a
curved ramp similar in shape to a half-pipe. There is a flat
horizontal surface with opposite...

Three blocks of masses m1=1.00 kg,
m2=2.00 kg, and m3=3.00 kg
are set at rest on a level air track from right to left. Then
m3 is pushed toward m2 with
a speed of 3.00 m/s. Assuming that all collisions are elastic, what
are the final speeds of (a) m1, (b)
m2, and (c) m3?

Two blocks of masses
m1 = 1.50 kg
and
m2 = 3.00 kg
are each released from rest at a height of
h = 4.40 m
on a frictionless track, as shown in the figure below, and
undergo an elastic head-on collision. (Let the positive direction
point to the right. Indicate the direction with the sign of your
answer.)
(a) Determine the velocity of each block just before the
collision.
(b) Determine the velocity of each block immediately after the...

Objects with masses m1 = 12.0 kg and
m2 = 8.0 kg are connected by a light string
that passes over a frictionless pulley as in the figure below. If,
when the system starts from rest, m2 falls 1.00
m in 1.48 s, determine the coefficient of kinetic friction between
m1 and the table.
Express the friction force in terms of the coefficient of kinetic
friction. Obtain an expression for the acceleration in terms of the
masses and the...

Two masses,
m1=3 kg and m2=2 kg are on a horizontal
surface and are connected together via a massless rope. An external
force F pulls on m1 at an angle q=30Â° from the
horizontal, as shown in the Figure 2 below. There is friction
between m2 and the surface, with coefficients of
friction
ms=0.4 and
mk=0.3, however the friction between m1 and
the surface is negligibly small.
What is the minimum value of F such that the masses will begin...

The figure below shows two masses m1 =8.6 kg and m2 =2.8 kg on a
frictionless surface. As shown, a force F1 =23.6 N pushes on m1
from the left and a force F2 = - 14.9 N pushes on m2 from the
right. Find the force that m1 exerts on m2. (Hint, make use of
Newton's third law and find the acceleration of the entire system
first).

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 4 minutes ago

asked 15 minutes ago

asked 19 minutes ago

asked 19 minutes ago

asked 21 minutes ago

asked 21 minutes ago

asked 22 minutes ago

asked 28 minutes ago

asked 29 minutes ago

asked 34 minutes ago

asked 35 minutes ago

asked 36 minutes ago