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4 years ago

You are throwing a ball straight up in the air. At the highest point, the ball’s

Physics

1 answer:

Afina-wow [57]4 years ago

8 0

The answer is C. Acceleration is nonzero, but it’s velocity is zero

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Humans are capable of vastly more complex thoughts and feelings due to the ever-adapting web of connection among?

salantis [7]

Are there answer choices ?

3 0

3 years ago

g If you keep the launch angle fixed, but double the initial launch speed, what happens to the range?

kiruha [24]

Answer:

Range will become 4 times of initial range

Explanation:

Let the velocity of projection is u

And angle at which projectile is projected is $\Theta$

And acceleration due to gravity is $g\ m/sec^2$

So range of projectile is equal to $R=\frac{u^2sin2\Theta }{g}$ ........eqn 1

Now in second case it is given that velocity of launching is doubled

So new velocity $u_{new}=2u$

So new range will be equal to $R_{new}=\frac{(2u)^2sin2\Theta }{g}=\frac{4u^2sin2\Theta }{g}$ .....eqn 2

Now dividing eqn 2 by eqn 1

$\frac{R_{new}}{R}=\frac{4u^2sin2\Theta }{g}\times \frac{g}{u^2sin2\Theta }$

$R_{new}=4R$

So if we double the initial launch speed then range will become 4 times

4 0

4 years ago

Two skiers start at the same place at the top of the hill, and finish at the same place at the bottom. Skier A takes a straight,

Rus_ich [418]

Answer:A

Explanation:

Given

Skier A takes straight, smooth route while Skier B takes curvy, bumpy route to finish.

We know gravity is conservative in nature i.e. work done against it is independent of path followed

So work done by gravity for A and B is same

According to Work energy Theorem Change in the kinetic Energy is equal to work done by all the forces.

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

$W_g=mgh$

where h=vertical height of hill

thus $v=\sqrt{2gh}$

which is same for both A and B

6 0

3 years ago

Object A has initial momentum p in the forward direction, but loses momentum at a rate of 0.35 kg·m/s2 until it stops moving. Ac

aliina [53]

Answer: a. net force is acting on object A in the same direction of its motion.

Explanation:

The second law of Newton states that the acceleration of a particular object is dependent on two main things which are the mass and force. According to the law, the acceleration of the object will be directly related to the net force while the acceleration is also relates inversely to the mass.

Therefore, based on the information given in the question, a force is acting on object A in the same direction of its motion.

8 0

3 years ago

Please help, thank you,

Elena-2011 [213]

same, stapler, gravity, motion, acceleration

6 0

3 years ago