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miskamm [114]
3 years ago
14

What is it's speed at this time? A rocket blasts off and moves straight upward from the launch pad with constant acceleration. A

fter 2.7s the rocket is at a height of 86m
Physics
1 answer:
zhenek [66]3 years ago
6 0

Answer: 31.85 m/s

Explanation:

Since we are talking about constant acceleration, we can use the following equation to find the speed s of the rocket:

s=\frac{d}{t}

Where:

d=86 m is the distance the rocket has traveled

t=2.7 s is the time in which the rocket has traveled the distance d

Solving the equation with the given data:

s=\frac{86 m}{2.7 s}

s=31.85 m/s This is the rocket's speed

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4 years ago
a straight, 2.5-m wire carries a typical household current of 1.5 a (in one direction) at location where the earth's magnetic fi
kotykmax [81]

Answer:

a

The magnitude of the force is  F=2.1*10^{-4}N

The direction is from south to north i.e upward

b

The magnitude of the force is  F=2.1*10^{-4}N

The direction is towards the west

c

The magnitude of the force is  F=2.1*10^{-4}N

the direction of the magnetic field is parallel to the direction of the current  (south to north ) hence the direction in 0 in comparison to the direction of the current

d

From the value of force  we got the answer to this question is No

Explanation:

Generally magnetic force is mathematically represented as

                  F = BIL

Where the B is the magnitude of the magnetic field which is given as

          B= 0.55 guass = \frac{0.55}{10000} = 0.55 *10^{-4}T

               I is the current with a value of I = 1.5A

               L is the length of the wire given as  L =2.5m

Substituting the value

             F =(0.55 *10^ {-4}) (1.5)(2.5)

                F=2.1*10^{-4}N

For the first case where the current is moving from west to east and we are told that the magnetic field is  from south to north the according to Fleming's right hand rule the force(exerted by earths magnetic field ) would be moving from south to north (i.e upward)

For the second case where current is moving vertically upwards the direction of the force is  to the west according to Fleming's right hand rule

 

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