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Vadim26 [7]
3 years ago
7

* An 10 kg box is sitting on a fairly smooth surface. Friction is still present. The coefficient of static friction

Physics
1 answer:
emmasim [6.3K]3 years ago
6 0
Jxsjoaaokajsjdfjififivixzkkzaja7272773
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When a slice of buttered toast is accidentally pushed over the edge of a counter, it rotates as it falls. If the distance to the
Ksenya-84 [330]

Answer: 4.83rad/s and 14.50 rad/s

Explanation:

The distance from the center to the floor d = 52cm = 0.52m

Rotation is less than 1 rev

The toast rotates at a constant angular speed

Using kinematic d = Vit + 1/2gt^2

d = 0+1/2gt^2

t = (2d/g) square root

t = square root of 2× 0.52/ 9.8

t = 0.325s

The toast is accidentally pushed over the edge of the centre with butter side up, then the toast rotates as it falls . If the toast hits the ground and topples, the smallest angle will be less than 1/4 rev with correspondence to the smallest angular speed

Wmin = change in tetha/ change in time

= 0.25 rev/ change in t

= 0.25×2pii / change in t

= 0.5pii/0.325

= 0.5×3.142/0.325

= 4.83 rad/s

The toast is accidentally pushed over the edge of the centre with butter side up, then the toast rotates as it falls . If the toast hits the ground and topples, the maximum angle will be less than 3/4 rev with correspondence to the maximum angular speed

Wmax = change in tetha/ change in time

= 0.75 rev/ Change in time

= 0.75 ×2pii/change in tetha

= 1.5pii/0.325

= 1.5 ×3.142/0.325

= 14.50 rad/s

Note the following

Vi is the initial speed of the toast which is zero because it was initially at rest

t is the time taken for the toast to hit the floor

g is the gravitational acceleration

d is the distance between the counter and the floor. There is an attachment for you as well.

Thanks

5 0
3 years ago
A plane is traveling at 80 m/s. To prepare for landing, itslows down at a rate of 0.25 ms squared for 120 seconds. Calculate the
Tanya [424]

Answer:

<em>The speed of the plane after it decelerates is 50 m/s</em>

Explanation:

<u>Motion with Constant Acceleration</u>

When an object gains or losses velocity in time, it acquires acceleration. If this value is constant, we can calculate the final velocity (or speed in scalar terms) as:

v_f=v_o+at

Where vf is the final speed, vo is the initial speed, a is the constant acceleration, and t is the time the acceleration is acting.

The plane is originally traveling at vo=80 m/s and it slows down at a constant rate of a=-0.25\ m/s^2 during t=120 seconds. Note we have added the negative sign to the acceleration because the plane is slowing down, i.e., the acceleration is against the speed.

Thus, the final speed is:

v_f=80-0.25*120

v_f=80-30=50

v_f = 50\ m/s

The speed of the plane after it decelerates is 50 m/s

8 0
3 years ago
A 700kg car had 12,000 joules of kinetic energy, Calculate it’s velocity !! please help due right now !!
Margarita [4]

Answer:

velocity of car=5.855 m/s

Explanation:

8 0
3 years ago
Heat likes to remain <br> ONMFRIU ← Whats that unscrambled?
OlgaM077 [116]
<span>So the question is how does heat prefer to remain and to unscramble the letters ONMFRIU. The unscrambled letters mean: UNIFORM. The heat likes to remain uniform because thermodynamic systems always tend to reach thermal equilybrium after some period of time that is specific for each system. </span>
5 0
3 years ago
Một nguồn O phát sóng cơ dao động theo phương trình u = 4cos(4pi t - pi/4). Tốc độ truyền sóng là 1m/s.
brilliants [131]

Answer:

ytrxrddyoxswsdyxgxghfx

jdjdu3jthh

hhhujusbrnog

hhjfjtinrny

ykrjrhrnirjtjjtt

tkrjthr74uu3jt

hri4urjjrjtjjtjtjy

y

Explanation:

uueuhhhwuejroskanficndui39wn

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