3 years ago

Two forces act in opposite directions on a wood block. What will happen if the forces are unbalanced?

Physics

1 answer:

mihalych1998 [28]3 years ago

8 0

Answer: Its the last one: The position of the block will change

Explanation: Since the forces are unbalanced, one side of the block will be stronger, therefore making the block move.

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As the water molecules heat up they become more dense and float to the top. True or False

miss Akunina [59]

Answer: False but read why

Heated water molecules expands ( become less dense) but they do float to the top.

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3 years ago

You have been hired to design a spring-launched roller coaster that will carry two passengers per car. The car goes up a 12-m-hi

Vlada [557]

Answer:

Vmax=11.53 m/s

Explanation:

from conservation of energy

$E_A} =E_{B}$

Spring potential energy =potential energy due to elevation

0.5*k*x²= mg $(h_{B}-h_{A} )$ =mgh

0.5*k*2.3²= 430*9.81*6

k=9568.92 N/m

For safety reason

k"=1.13 *k= 1.13*9568.92

k"=10812.88 N/m

agsin from conservation of energy

$E_A} =E_{C}$

spring potential energy=change in kinetic energy

0.5*k"*x²=0.5*m* $V_{max}^{2}$

10812.88 *2.3²=430* $V_{max}^{2}$

$V_{max}$ =11.53 m/s

5 0

3 years ago

Please I need help on this

Alexxandr [17]

Number 4 I think
the atomic mass is 11 because the mass is the sum of protons and neutrons

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3 years ago

how does gravity affect objects of different mass close to earth, and how does that effect change as an object moves farther fro

Luda [366]

Answer:

It makes it lighter when its closer and heavier when its farther way.

Explanation:

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2 years ago

A woman in a sprint race accelerates from rest to 8.7 m/s in 2.7 s. What is her displacement?

Trava [24]

Answer:

23.49m

Explanation:

Distance = velocity x time

8.7 x 2.7 = 23.49m

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2 years ago