Which type of earthquake waves is the last to be recorded on a seismogram?

A 2.40 kg can of coffee moving at 1.50 m/s in the +x-direction on a kitchen counter collides head-on with a 1.20 kg box of macar

liraira [26]

Answer:

The macaroni travels with a velocity of 1.35 m/s in the +x-direction.

Explanation:

By the conservation of momentum principle and assuming there is no external force (e.g. friction) acting on the system, the total initial momentum is equal to the total final momentum.

We take all velocities in the +x-direction as positive.

Initial momentum of coffee can = (2.40 kg)(1.50 m/s) = 3.60 kg m/s

Initial momentum of macaroni = (1.20 kg)(0.00 m/s) = 0.00 kg m/s

Total initial momentum = (3.60 + 0.00) kg m/s = 3.60 kg m/s

Final momentum of coffee can = (2.40 kg)(0.825 m/s) = 1.98 kg m/s

Final momentum of macaroni = (1.20 kg)(v m/s) = 1.20v kg m/s

Total final momentum = (1.98 + 1.20v) kg m/s

Equating both initial and final total momenta,

3.60 kg m/s = (1.98 + 1.20v) kg m/s

1.20v kg m/s = 1.62 kg m/s

v = (1.62 kg m/s) ÷ (1.20 kg) = 1.35 m/s

Since this is positive, the macaroni travels with a velocity of 1.35 m/s in the +x-direction.

6 0

3 years ago

In the 4 X 100M relay, how long is the acceleration zone..

valkas [14]

Answer:it’s 400 meters

Explanation:

3 0

3 years ago

Part e a small toy cart equipped with a spring bumper rolls toward a wall with a speed of v. the cart rebounds from the wall, wi

jeka94

Answer:

Δp = -2 p₀

Explanation:

The momentum is defined by

p = m v

In this case we write the initial and final momentum, we take as positive the direction towards the wall.

p₀ = m v

p_f = m (-v)

the negative sign is because the car is bouncing off the wall

the change of the moment is

Δp = p_f - p₀

Δp = - m v - m v

Δp = -2 mv

Δp = -2 p₀

we see that the change of moment is twice the moment, in the attachment we can see the vectors of these changes and the sign indicates the direction of the change at the moment

5 0

3 years ago

Initilal velocity of projectile at an angle of 22.5° is 10m/s. Then what is the magnitude of range of projectile?

crimeas [40]

Answer:

0.707m

Explanation:

from formula of range i.e R=Usin2Q/g

3 0

3 years ago

The same book with a mass of 3 kg is now at rest on a bookshelf 5 meters above the ground. What is the book’s kinetic energy?

RoseWind [281]

Answer:

0 J

Explanation:

Since the book is at rest then its velocity will be zero therefore

K.E=

$\frac{1}{2} m {v}^{2}$

since v=0

then

K.E= 0

6 0

3 years ago