All categories

3 years ago

if you traveled the first 150km in 2.5 hours ,and the second part of the trip,100km in 1.4 hours.what w your average speed

Physics

1 answer:

ozzi3 years ago

8 0

Answer:

The average speed of the travel was 64.1 km/h.

Explanation:

We can calculate the average speed of the travel as:

s = (s₁ + s₂) / n = (150 km/h + 100 km/h) / 2 = 250 km / 2 = 125 km/h

where:

s: average speed of the entire travel

s₁: average speed of the first part of the trip

s₂: average speed of the second part of the trip

n: number of parts of the trip

You might be interested in

If the value of static friction for a couch is 400N, what could be a possible value of its kinetic friction? *

Dafna11 [192]

Answer:

kinetic friction may be greater than 400 N or smaller than 400 N

Explanation:

As we know that maximum value of static friction on the rough surface is known as limiting friction and the formula of this limiting friction is known as

$F_s = \mu_s N$

now when object is sliding on the rough surface then the friction force on that surface is known as kinetic friction and the formula of kinetic friction is known as

$F_k = \mu_k N$

now we know that

$\mu_k < \mu_s$

so here value of limiting static friction force is always more than kinetic friction

also we know that

initially when body is at rest then static friction value will lie from 0 N to maximum limiting friction

and hence kinetic friction may be greater than static friction or if the static friction is maximum limiting friction then kinetic friction is smaller than static friction

so kinetic friction may be greater than 400 N or smaller than 400 N

5 0

3 years ago

20 kg object travels 28 meter and stops. coefficient friction= 0.085 how much work was done by friction?

Tresset [83]

Assuming it is on a horizontal surface:
friction = μR
R = 20g (g is gravity 9.81)
so Friction = 0.085 x 20g
Work done is force x distance
so Work done = 0.085 x 20g x 28
= 466.956 J

7 0

3 years ago

A light bulb whose resistance is 240 ohms is connected to a 120 voltage source. What is the current through the bulb?

Sedaia [141]

Answer:

0.5A

Explanation:

Using $R = \frac{V}{I}$ ,

R is the resistance (in Ohms)

V is the voltage (in V)

I is the current (in A)

$240=\frac{120}{I}$

I = 0.5A

7 0

2 years ago

A woman with a mass of * kg is standing on the rim of a large disk that is rotating at an angular velocity of 0.550 rev/s about

Sladkaya [172]

The disk has a mass of 104kg and a radius of 4.10m . Calculate the magnitude of the total angularmomentum of the woman-plus-disk system. (Assume that you ... A woman with mass 50.5kg isstanding on the rim of a large disk that is rotating at 0.505rev/s about an axis perpendicular to itthrough its center. The disk has a ...

7 0

2 years ago

What energy transformation takes place in the solar panel?

aliina [53]

I think it’s the first option

3 0

3 years ago