Mechanics | Relativity Answers

Find the sum of vector A and B
A=4i + 4j
B=4i - 8j

Find the sum of vector A and B
A=2i +2j
B=2i - 4j

A Jet lands on a aircraft carrier at 180 mile (123 m/s) (a)what is its acceleration if it stops in 3 second (b)what is the displacement of the plane which it is stopping

Ali walks 120 meter east, 150 meter south 40 meter east find the distance and displacement?

A ball (20g)is released From (1m) above ground while it is connected to a string and hits a (40g) block causing the block to move over a rough surface and stops after (20m)
Find friction?

1.) A cello string vibrates in its fundamental
mode with a frequency of 179 1/s. The vibrating segment is 29.2 cm long and has a
mass of 0.75 g.
Find the tension in the string.
Answer in units of N

2).Find the frequency of the string when it
vibrates in seven segments.
Answer in units of 1/s.

A phone cord is 6.75 m long. The cord has
a mass of 0.247 kg. A transverse wave pulse is produced by plucking one end of the taut
cord. The pulse makes four trips down and
back along the cord in 0.748 s.
What is the tension in the cord?
Answer in units of N.

A particle executes simple harmonic motion
with an amplitude of 2.69 cm.
At what positive displacement from the
midpoint of its motion does its speed equal
one half of its maximum speed?
Answer in units of cm.

The displacement in simple harmonic motion
is maximum when the
1. velocity is zero.
2. kinetic energy is a maximum.
3. acceleration is zero.
4. velocity is a maximum.
5. linear momentum is a maximum.

A load of 49 N attached to a spring hanging
vertically stretches the spring 3.1 cm. The
spring is now placed horizontally on a table
and stretched 13 cm.
What force is required to stretch it by this
amount?
Answer in units of N.