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vladimir1956 [14]
3 years ago
6

What is the average speed of an object with a total distance traveled of 45 meters in 50 seconds

Physics
1 answer:
Anettt [7]3 years ago
7 0

Answer: 0.9m/s

Explanation:

Use equation for speed:

V=S/t

S-distance; S=45m

t-time; t=50 s

V=S/t

V=45m/50s

V=0.9 m/s

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How do speed and velocity differ
Elanso [62]

Answer: Speed is a scalar

LVelocity is a vector quantity

Explanation: Scalar quantity such as speed only have magnitude in them. It only indicates the strength on how an object is moving. For velocity it is a vector quantity it both have magnitude and involves direction where the object is moving.

4 0
3 years ago
An inductor is connected to the terminals of a battery that has an emf of 12.0 V and negligible internal resistance. The current
algol13

Answer:

R = 2481 Ω  

L= 1.67 H

Explanation:

(a) We have an inductor L which has an internal resistance of R. The inductor is connected to a battery with an emf of E = 12.0 V. So this circuit is equivalent to a simple RL circuit. It is given that the current is 4.86 mA at 0.725 ms after the connection is completed and is 6.45 mA after a long time. First we need to find the resistance of the inductor. The current flowing in an RL circuit is given by

i = E/R(1 -e^(-R/L)*t)                                                   (1)

at t --> ∞ the current is the maximum, that is,  

i_max = E/R

solve for R and substitute to get,  

R=  E/i_max

R = 2481 Ω  

(b) To find the inductance we will use i(t = 0.940 ms) = 4.86 mA, solve (1) for L as,  

Rt/L = - In (1  - i/i_max )

Or,  

L = - Rt/In (1  - i/i_max )

substitute with the givens to get,

L = -(2481 Si) (9.40 x 10-4 s)/ In (1  - 4.86/6.45 )  

L= 1.67 H

<u><em>note :</em></u>

<u><em>error maybe in calculation but method is correct</em></u>

8 0
2 years ago
Read 2 more answers
20 POINTS! PLZ HELP ME. :-)
VladimirAG [237]

Answer:

A

Explanation:

Because both the elements are non-metals

3 0
2 years ago
a uniform rod of length 1.5m is placed over a wedge at 0.5m from one end .a force of 100 N is applied at its one end near the we
andreev551 [17]

Explanation:

The rod is uniform, so the center of gravity is at the center, or 0.75 m from the end.  The wedge is 0.5 m from the end, so the center is 0.25 m from the wedge.

Sum the torques about the wedge (it may help to draw a diagram first).  Take counterclockwise to be positive.

∑τ = Iα

W (0.25 m) − (100 N) (0.50 m) = 0

W = 200 N

Sum the forces in the y direction.

∑F = ma

F − 100 N − 200 N = 0

F = 300 N

8 0
3 years ago
An object in free fall travels a distance s that is directly proportional to the square of the time t. If an object falls 1088 f
ikadub [295]

Answer:

1,700feet

Explanation:

If an object in free fall travels a distance s that is directly proportional to the square of the time t, this can be represented mathematically as;

S = kt²where;

k is the proportionality constant

K = s/t²

s1/t1²= s2/t2²= Sn/tn²= k for values of the distance and time. Using the formula

s1/t1² = s2/t2² where;

s1 is the falling distance in time t1 s2 is the falling distance in time t2

Given s1 = 1088feet, t1 = 8secs, s2 = ? t2 = 10secs

Substituting this value in the formula to get s2, we have;

1088/8²= s2/10²

64s2= 108800

s2 = 108800/64

s2 = 1,700feet

This means the object will fall a distance of 1,700feet in 10seconds

5 0
2 years ago
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