The statement “Heavy objects fall faster than light objects” is an example of a(n) ______

A car is stopped at a traffic light. When the light turns green, the car starts from rest with an acceleration of 2.5 m/s2 . Als

erma4kov [3.2K]

Answer:

a) f = 453.3Hz

b) f = 443.1Hz

c) f = 420Hz

Explanation:

First of all we need to know the positions and velocities of both vehicles.

For the car:

Xc(-5) = 0m; Vc(-5) = 0m/s

$Xc(5) = 2.5*5^2/2=31.25m$ ; Vc(5)=2.5*5 = 12.5m/s

$Xc(10)=2.5*10^2/2=125m$ ; Vc(10)=2.5*10=25m/s

For the truck:

Xt(-5)=10*(-5) = -50m; Vt(5)=10m/s

Xt(5)=10*5 = 50m; Vt(5)=10m/s

Xt(10)=10*10=100m; Vt(10)=10m/s

Now for part a) t=-5s. The truck is behind the car, so:

$f=\frac{C}{C-Vt}*fo = 453.3Hz$

Now for part b) t=5s. The car is behind the truck, so:

$f=\frac{C+Vc}{C+Vt}*fo = 443.1Hz$

Now for part b) t=10s. The truck is behind the car, so:

$f=\frac{C-Vc}{C-Vt}*fo = 420Hz$

8 0

3 years ago

When doing a squat, how do you do it without getting hurt?

Aleksandr [31]

I do weight lifting so you need feet flat on floor but out back straight and also a spotter

7 0

2 years ago

Read 2 more answers

What is weight vs mass

Ray Of Light [21]

Weight is the measurement of the pull of gravity on an object, while mass is the measurement of the amount of matter that an object contains.

8 0

2 years ago

Armand hands the rock to Pierre, who is standing next to the trampoline. Explain how Armand moves, in terms of the forces acting

Nikolay [14]

Answer:

Armando's weight ,restored force created by the trampoline

a harmonic movement within the trampoline

Explanation:

In a trampoline we have two forces that actuate Armando's weight and the restored force created by the trampoline that depends on the deformation distance of the elastic canvas.

Amando's weight is vertical and directed towards the center of the Earth and has a constant value, this weight is balanced with the elastic force the springboard exerts on Armando in a vertical direction.

In general, when entering the trampoline, a small jump is made, this creates a speed that deforms the canvas until the speed is reduced to zero, at this point the elastic force is greater than the weight and the boy begins to climb, After the boy leaves the canvas he meets only the force of gravity and his speed decreases to zero and begins his fall.

In Summary Armando is in a harmonic movement within the trampoline

6 0

3 years ago

An electron in a TV picture tube is accelerated through a potential difference of 10 kV before it hits the screen. What is the k

laiz [17]

Answer:

10,000 eV

Explanation:

According to the law of conservation of energy, the kinetic energy gained by the electron is equal to its change in electric potential energy:

$K=\Delta U=q \Delta V$