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Arturiano [62]
3 years ago
10

Why do all objects hit with the same velocity (ignoring air resistance) if dropped from the same height?

Physics
2 answers:
dlinn [17]3 years ago
7 0

the answer to this question  is A because If no air resistance is present, the rate of descent depends only on how far the object has fallen, no matter how heavy the object is. This means that two objects will reach the ground at the same time if they are dropped simultaneously from the same height. ... In air, a feather and a ball do not fall at the same rate.

Len [333]3 years ago
7 0

Answer: C)Acceleration due to gravity affects all bodies the same since it depends primarily on the gravity of the planet, not on the object being dropped.

       

Explanation:

Using equation of motion,

v^{2}=u^{2}+2gh

where v= final velocity , u= initial velocity , h= height from where object is dropped ,acceleration due to gravity , g=\frac{GM}{R^{2}}

G= universal gravitational constant, M=mass of planet , R= radius of planet

Therefore g depends on mass and radius of planet .

=>If all objects are dropped from same height with zero initial speed the final speed depends only on acceleration due to gravity which is a property of planet taken into consideration and does not depend on the object.

For example if a piece of paper and a heavy stone are dropped from the same height with zero initial speed then both objects will have same final speed .

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An RV is traveling 60 km/h along a highway. A boy sitting near the driver of the RV throws a ball to another boy at the back end
alina1380 [7]

Answer:

Speed of the ball relative to the boys: 25 km/h

Speed of the ball relative to a stationary observer: 35 km/h

Explanation:

The RV is travelling at a velocity of

v_{RV}=+60 km/h

Here we have taken the direction of motion of the RV as positive direction.

The boy sitting near the driver throws the ball back with speed of 25 km/h, so the velocity of the ball in the reference frame of the RV is

v_B = -25 km/h

with negative sign since it is travelling in the opposite direction relative to the RV. Therefore, this is the velocity measured by every observer in the reference frame of the RV: so the speed measured by the boys is

v = 25 km/h

Instead, a stationary observer outside the RV measures a velocity of the ball given by the algebraic sum of the two velocities:

v = +60 km/h + (-25 km/h) = +35 km/h

So, he/she measures a speed of 35 km/h.

5 0
3 years ago
A conservative force does the same work regardless of the path taken.
ella [17]

A conservative force is a force that when work is done against this force the work done does not depend on the path taken only the initial and final position.

5 0
3 years ago
Read 2 more answers
What is big and green with horns and jumps high?
shusha [124]
The answer would be a frog!
7 0
3 years ago
Read 2 more answers
Why might the cost of fossil fuels become more expensive in the future?
ki77a [65]
Because fossil fuels are non-renewable resources.

This means, if we run out, we will not be able to reproduce it.
It would be the last that exists. (For oil, it'd be for the next few hundred years.)
3 0
3 years ago
A box is pulled to the right with a force of 65 n at an angle of 58 degrees to the horizontal the surface of frictional is the F
umka21 [38]

Answer:

The force acting in x direction is 34.44 N

Explanation:

We have,

Force acting on the box is 65 N at an angle of 58 degrees to the horizontal the surface of frictional.

It is required to find the net force in x- direction.

The net force acting in the x- direction is given by :

F_x=F\cos\theta\\\\F_x=65\times \cos(58)\\\\F_x=34.44\ N

So, the force acting in x direction is 34.44 N.

4 0
3 years ago
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