A 1875 kg car going 23.0 m/s rear-ends a 1025 kg compact car going 17.0 m/s on ice in the same direction. The two cars lock together. How fast do the cars move together immediately after the collision?

The final velocity of both cars is 20.87 m/s.

Given that the two cars have a mass of 1875 kg and 1025 kg respectively and the velocity of both the cars is 23.0 m/s and 17.0 m/s.

The common velocity of both cars is given below.

Where v is the final velocity of both cars, m1 and m2 are the mass of both cars respectively. u1 and u2 are the initial velocities of both cars.

Substituting the values, we get the final velocity.

Hence we can conclude that the final velocity of both the cars is 20.87 m/s.

To know more about the velocity, follow the link given below.

link.

21 m/s

Explanation:

If

m1 = mass of 1875 kg car

u1 initial speed of 187 kg car = 23.0 m/s

m2 = mass of 1025 kg car

u2= initial speed of 1025 kg car = 17.0 m/s

Since they stuck together, they have a common final velocity v

From principle of conservation of linear momentum

m1u1 + m2u2 = (m1 + m2) v

v= m1u1 + m2u2/(m1 + m2)

v= 1875 × 23 + 1025× 17/(1875 + 1025)

v= 43125 + 17425/2900

v= 21 m/s

it about 600 mph from what i calculated

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: