Answer:True
Explanation:
We know that frequency in a tight string is given by

where 


and velocity is given by

As
increases v also increase but wavelength
remain same because ends of string are fixed.
Answer:
Explanation:
Momentum is a concept and is defined as,
Momentum = mass × velocity
So to calculate the momentum of the car
momentum of the car = mass of the car × velocity of the car
So we get,
momentum of the car = 1800 × 30
= 54000 Ns