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ivolga24 [154]
3 years ago
5

2. What is the power rating of an engine capable of lifting a 100 kg object 5 m vertically

Physics
1 answer:
Leya [2.2K]3 years ago
7 0
Work=f.d
Work=100*50 = 500
Power = work/time = 500/4
=125 watt
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As waves get closer to a beach they _____.
krok68 [10]

Answer:

Increase in energy

Explanation:

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A tow truck exerts a net force of 1000 N on a 600 kilogram car What’s the cars acceleration
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a = 1000/600= 5/3 m/s^2

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PLEASE HELP.You hit a hockey puck across an empty hockey rink. At first the puck moves quickly, but then it slows and comes to a
saveliy_v [14]
Hi there!

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7 0
3 years ago
Read 2 more answers
Quartz, SiO2, contains 46.7% silicon by mass. What mass of silicon is present in 348 g of quartz? You must show your work.
anastassius [24]

Answer:162.516 gm

Explanation:

Given

Quartz contains 46.7 % silicon by mass

i.e.Silicon is 46.7 % by mass

Total mass of Quartz m=348 gm

46.7% of 348 gm

=\frac{46.7}{100}\times 348=162.516 gm        

8 0
3 years ago
A bowling ball of mass m=1.7kg is launched from a spring compressed by a distance d=0.31m at an angle of theta=37 measured from
vodomira [7]

Answer:

k = 1 700.7 N/m

v0 = 9.8 m/s^2

Explanation:

Hello!

We can answer this question using conservation of energy.

The potential energy of the spring (PS) will transform to kinetic energy (KE) of the ball, and eventually, when the velocity of the ball is zero, all that energy will be potential gravitational (PG) energy.

When the kinetic energy of the ball is zero, that is, when it has reached its maximum heigh, all the potential energy of the spring will be equal to the potential energy of the gravitational field.

PS = (1/2) k x^2  <em>where x is the compresion or elongation of the spring</em>

PG = mgh

a)

Since energy must be conserved and we are neglecting any energy loss:

PS = PG

Solving for k

k = (2mgh)/(x^2) = ( 2 * 1.7 * 9.81 * 4.9 Nm)/(0.31^2 m^2)

k = 1 700.7 N/m

b)

Since the potential energy of the spring transfors to kinetic energy of the ball we have that:

PS = KE

that is:

(1/2) k x^2 = (1/2) m v0^2

Solving for v0

v0 = x √(k/m) = (0.31 m ) √( 1 700.7 N/m / 1.7kg)

v0 = 9.8 m/s^2

8 0
3 years ago
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