In a position vs time graph if the line is curved then the motion of the object may be

A bird flies west with a velocity of 8 m/s . How long does it take the bird to travel a horizontal distance of 400 meters ?

Ahat [919]

The time taken is 50 s

Explanation:

For a body moving in uniform motion (= at constant velocity), the velocity of the body is given by:

$v=\frac{d}{t}$

where

v is the velocity

d is the distance covered

t is the time taken

In this problem, we have a bird travelling with uniform motion. We know that:

v = 8 m/s is the velocity of the bird

d = 400 m is the distance travelled

Solving for t, we find the time the bird needs to cover this distance:

$t=\frac{d}{v}=\frac{400}{8}=50 s$

Learn more about velocity:

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3 0

4 years ago

Do you get more flexible by stretching

Alex Ar [27]

Answer:

Yes

Explanation:

By stretching, parts pf your body loosen and become more flexible.

3 0

3 years ago

Read 2 more answers

What force must be provided to accelerate a 64-lb object upward at a rate of 2 ft/s2? (Use g = 32 ft/s2.)

vovikov84 [41]

Answer:

The force that must be provided to accelerate the object = 302.196 N

Explanation:

Force: Force can be defined as the product of mass and acceleration. The S.I unit of force is Newton (N).

Ft - W = ma............ Equation 1

Ft = W + ma .......... Equation 2

Where Ft = force provided, W = weight of the object, m= mass of the object, a = acceleration of the object.

Given: mass = 64 lb, g = 32 ft/s² a = 2 ft/s²

Conversion: (i) from 64 pounds to Kg = 64/2.2046

= 29.03 kg

(ii) from 2 ft/s² to m/s² = 0.3048 × 2 = 0.6098 m/s²

(iii) from 32 ft/s² to m/s² = 0.3048×32 = 9.8 m/s².

and W = mg = 29.03 × 9.8 = 284.494 N,

Substituting these values into equation 2,

Ft = 284.494 + 29.03×0.6098

Ft = 284.494 + 17.7

Ft = 302.196 N

Therefore, the force that must be provided to accelerate the object = 302.196 N

8 0

3 years ago

A 0.0780 kg lemming runs off a 5.36 m high cliff at 4.84 m/s. what is its potential energy (PE) when it is 2.00 m above the grou

zloy xaker [14]

Answer:

1.5288 J

Explanation:

We can use the Energy conversion law

Energy can not be made or destroyed. It can only be converted to another form of energy

Potential Energy (PE) is the energy an object has due to its height of the location

PE = mass * gravitational acceleration * height from the ground

Simply here , lemming had a PE and KE also.

(g = 9.8 m/s²)

PE = 0.0780 * 9.8 *2

= 1.5288 J

4 0

3 years ago

A certain type of bird lives in two regions of a state. The distribution of weight for birds of this type in the northern region

Annette [7]

Answer: (a) Z-score are 1 and -1.2 for northern and southern regions, respectively.

Explanation: Z-score is how many standard deviations a data is from the population mean or how far a data point is from the mean.

The z-score is calculated by the following:

$z=\frac{x-\mu}{\sigma}$

where

x is the data point

μ is population mean

σ is standard deviation

For the northern region birds:

μ = 10, σ = 3, x = 13

$z=\frac{13-10}{3}$

z = 1

The z-score for birds living in the northern region is 1, which means it is 1 standard deviation above the mean.

For the southern region:

μ = 16, σ = 2.5, x = 13

$z=\frac{13-16}{2.5}$

z = -1.2

The z-score for southern living birds is -1.2, meaning it is 1.2 standard deviations below the mean.

6 0

3 years ago