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4 years ago

Can an object be speeding up with. a negative acceleration

Physics

1 answer:

katrin [286]4 years ago

6 0

Answer:

An object with negative acceleration could be speeding up, and an object with positive acceleration could be slowing down. ... Consider the fact that acceleration is a vector that points in the same direction as the change in velocity.

Explanation:

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The graph below represents the motion of four cars, labeled W, X, Y, and Z.

ycow [4]

Answer:

Answer is A

Explanation:

As we know , for constant velocity we get a straight line.

The formula for this problem is s = vt which is similar to a straight line formula like y = mx + c.

If we put here c = 0 we get the formula for distance and velocity.

So the answer is A.

6 0

3 years ago

Spiderman, whose mass is 74.0 kg, is dangling on the free end of a 11.0-m-long rope, the other end of which is fixed to a tree l

Anestetic [448]

Answer:

W = -1844.513 J

Explanation:

GIVEN DATA:

mass of spider man is m 74 kg

vertical displacement if spider is 11 m

final displacement = 11 cos 60.6 = - 6.753 m

change in displacement is = -6.753 - (-11) = 4.25 m

gravity force act on spiderman is f = mg = 74 × 9.8 = 725.2 N

work done by gravity is $W = F \delta r cos\theta$

$W = 725.2 \times 4.25 \times cos 180$

where 180 is the angle between spiderman weight and displacement

W = -1844.513 J

7 0

3 years ago

What is imperceptible human motion?

castortr0y [4]

Unable to be noticed or not felt because of feeling slight

3 0

4 years ago

A 60.0-kg person rides in an elevator while standing on a scale. the scale reads 400 n. the acceleration of the elevator is clos

Keith_Richards [23]

Reading of the scale will be given as Normal force on the man

So here we can say that

weight of the mas will be

$W = mg = 60*10 = 600 N$

normal force on the man will be given as

$F_n = 400 N$

now net force is given by Newton's II law

$F_{net} = ma$

$F_g - F_n = ma$

$600 - 400 = 60*a$

$a = \frac{200}{60} = \frac{10}{3}$

a = 3.33 m/s^2

so elevator is accelerating downwards with an acceleration a = 3.33 m/s^2

4 0

4 years ago

Read 2 more answers

I need help now please help me

alexandr1967 [171]

The correct answer is C. Plug in x and y value for answers to see if they work. For example, 9/3 = 3. So C is the answer.

8 0

4 years ago