All categories

3 years ago

A balloon-powered car rolls across the floor at a speed of 0.711 m/s. How long does it take to cover 8.25 m?

Physics

1 answer:

devlian [24]3 years ago

5 0

Answer:

Time = 11.60 seconds.

Explanation:

Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.

Mathematically, speed is given by the equation;

$Speed = \frac{distance}{time}$

Given the following data;

Speed = 0.711m/s

Distance = 8.25m

To find the time;

Making time the subject of formula, we have;

$Time = \frac{distance}{speed}$

Substituting into the equation, we have;

$Time = \frac{8.25}{0.711}$

Time = 11.60 secs.

You might be interested in

How does space exploration help scientists learn about the universe?

postnew [5]

If they research it then they would get the answer that they need to find out of the universe that is what I think.
<span />

6 0

3 years ago

Which characterstics do venus and earth share

xxTIMURxx [149]

Answer:

Earth and Venus has similar size, mass and density. Both have a very similar composition, But atmosphere of Venus is composed only of carbon dioxide is not similar to Earth.

Explanation:

my mind

5 0

3 years ago

An archer puts a 0.30 kg arrow to the bowstring. An average force of 201 N is exerted to draw the string back 1.3 m.a. Assuming

Vlad [161]

Answer:

Explanation:

Given

mass of archer $m=0.3\ kg$

Average force $F_{avg}=201\ N$

extension in arrow $x=1.3\ m$

Work done to stretch the bow with arrow

$W=F\cdot x$

$W=201\times 1.3=261.3\ m$

This work done is converted into kinetic Energy of arrow

$W=\frac{1}{2}mv^2$

where v= velocity of arrow

$261.3=\frac{1}{2}\times 0.3\times v^2$

$v=\sqrt{1742}$

$v=41.73\ m/s$

(b)if arrow is thrown vertically upward then this energy is converted to Potential energy

$W=mgh$

$261.3=0.3\times 9.8\times h$

$h=\frac{261.3}{0.3\times 9.8}$

$h=88.87\ m$

4 0

3 years ago

As you stand on a floor, the floor exerts an upward force on you. why are you not moved upward by this force? 1. the upward forc

dolphi86 [110]

Newton's third law of motion states that for any action, there is equal and opposite force. For a person standing on a floor, the action force is the weight and thus the floor must exert an opposite and equal reaction force equivalent in magnitude to the weight of the person.

In this regard, statement 3. is correct.

6 0

3 years ago

A 5.00 kg crate is suspended from the end of a short vertical rope of negligible mass. An upward force F(t) is applied to the en

gayaneshka [121]

Answer: 75.05N

Explanation:

According to newton's second law,

Force = mass×acceleration

Given mass = 5.0kg

Acceleration = change in velocity/time

Velocity = change in displacement/position/time i.e dy/dt

Given position of the particle as y(t)=(2.80 m/s)t +(0.61 m/s)t³

dy/dt = 2.80 + 3(0.61)t²

V = dy/dt = 2.80 + 1.83t²

Acceleration (a) = dv/dt = 2(1.83)t

dv/dt = 3.66t

To get the force when t =4.10second

dv/dt @ t = 4.10s will be 3.66(4.10)

acceleration = 3.66×4.10 = 15.01m/s²

Magnitude of the force F = ma

F = 5.0kg × 15.01m/s²

F = 75.05N

3 0

3 years ago