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velikii [3]
3 years ago
13

In a video game, a ball moving at 0.6 meter/second collides with a wall. After the collision, the velocity of the ball changed t

o -0.4 meter/second. The collision takes 0.2 seconds to occur. What’s the acceleration of the ball during the collision? Use .
Physics
1 answer:
DENIUS [597]3 years ago
6 0

Answer:

-5 m/s²

Explanation:

Acceleration = change in velocity / change in time

a = (v − v₀) / (t − t₀)

a = (-0.4 m/s − 0.6 m/s) / 0.2 s

a = -5 m/s²

The ball decelerates at a rate of -5 m/s².

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An object is allowed to fall freely near the surface of an unknown planet. The object falls 72 meters from rest in 4.0 seconds.
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7 0
2 years ago
Read 2 more answers
A football player, with a mass of 69.0 kg, slides on the ground after being knocked down. At the start of the slide, the player
White raven [17]

Answer:

(a) -472.305  J

(b) 1 m

Explanation:

(a)

Change in mechanical energy equals change in kinetic energy

Kinetic energy is given by0.5mv^{2}

Initial kinetic energy is 0.5\times 69\times 3.7^{2}=472.305 J

Since he finally comes to rest, final kinetic energy is zero because the final velocity is zero

Change in kinetic energy is given by final kinetic energy- initial kinetic energy hence

0-472.305  J=-472.305  J

(b)

From fundamental kinematic equation

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

Where v and u are final and initial velocities respectively, a is acceleration, s is distance

Making s the subject we obtain

s=\frac {v^{2}-u^{2}}{-2a} but a=\mu g hence

s=\frac {v^{2}-u^{2}}{-2\mu g}=\frac {0^{2}-3.7^{2}}{-2*0.7*9.81}=0.996796272\approx 1 m

7 0
3 years ago
The slope of a position-timw graph can be used to find the moving objects.....?​
Fofino [41]

Answer:

Velocity

Explanation:

The slope of a position-time graph gives velocity of a moving object.

8 0
2 years ago
Clyde and Marilyn are riding a roller coaster. During which section of the track is their potential energy converted to kinetic
Alex17521 [72]

Potential energy is when the roller coaster rises. Kinetic energy is when the roller coaster declines.

5 0
3 years ago
Nerve impulses in a human body travel at a speed of about 100 m/s. Suppose a man accidentally stubs his toe. About how much time
alexandr1967 [171]

Answer:

t = 0.018 s  

Explanation:

given,

nerve impulse in human body travel at a speed of  = 100 m/s

height of the man = 1.80 m

time taken by the impulse to travel from foot to brain = ?

distance = speed × time                      

1.80 = 100 × t                                              

t =\dfrac{1.80}{100}                                    

t = 0.018 s                            

hence, the time taken by the nerve to reach brain from toe is 0.018 s

5 0
3 years ago
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