Answer:
Explanation:
The initial kinetic energy will be increased by the loss of potential energy and be decreased by the work of friction.
½mv₁² = ½mv₀² + mgh - Fd
½70v₁² = ½(70)14² + 70(9.8)(30) - 13(440)
v₁ = 24.9112... ≈ 25 m/s
Answer: An object is accelerating if it is changing its velocity.
Answer:
359 m/s
Explanation:
Highest frequency a person can hear is 20,000Hz.
f = c × λ
Frequency = Wave speed × Wavelength
Wavelength = 20,000 ÷ 343 = 58.31m
Wavespeed = Frequency ÷ Wavelength
c = 20,950 ÷ 58.31 = 359.3 m/s
= 359 m/s (3 s.f.)
Answer:
false
Explanation:
Linear momentum is the product of an objects mass and velocity
p=m×v