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OleMash [197]
4 years ago
10

If one bullet is dropped from a certain height and another is fired from a gun horizontally from the same height which one will

hit the ground first or will they hit at the same time?
Physics
1 answer:
Zinaida [17]4 years ago
7 0

If the ground is flat, and both bullets are released at the same time from the same height, then they both hit the ground at the same time.

The horizontal motion of the one from the gun has no effect on its vertical motion.

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Calculate the force of gravity on the 0.50-kg mass if it were 6.4×106 m above earth's surface (that is, if it were two earth rad
Sunny_sXe [5.5K]

Radius of Earth is given as

R = 6.4 * 10^6 m

now here the height from the surface of earth is same as that of radius

h = 6.4 * 10^6 m

now here the acceleration due to gravity at this height is given as

g' = \frac{GM}{(R+h)^2}

g' = \frac{GM}{4R^2}

g' = \frac{g}{4}

now the force of gravity on the given object will be

F = mg'

F = m*\frac{g}{4}

F = 0.5 * \frac{9.8}{4}

F = 1.225 N

<em>so the force of gravity on it is 1.225 N</em>

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iogann1982 [59]
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8 0
4 years ago
The velocity-time graph of an object moving north-west is shown here. What is the instantaneous velocity of the object at time t
LUCKY_DIMON [66]

Answer:

4.2 m/s

Explanation:

The velocity-time graph is piecewise linear. The acceleration in each of the three segments of the graph is uniform. The instant  lies between  and t = 6.0s 100 s, so the acceleration must be calculated using the slope of the middle segment.  

a =  

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The instantaneous velocity is to be found after the object accelerates over an interval T = (7.0 - 6.0) s = 1.0 s, starting from a velocity of 2.4 m/s,

So the velocity at t = 7.0 s is

v = u + aT = 2.4 m/s + (1.8 m/s2)(1.0 s) = 4.2 m/s

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3 years ago
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bezimeni [28]
The answer is B. Snake.

Hope this helps!
7 0
4 years ago
Read 2 more answers
A boat moves 60 kilometers east from point A to point B. There, it reverses direction and travels another 45 kilometers toward p
Alexxx [7]

Answer:1) the total distance is the sum of the two distances

60 km +  45 km = 105 km

2) The displacement is the net movement, or the difference between the initial position and the final position

Call x the initial position, then the final position is x + [60km - 45km]

And the displacement is x + (60km - 45km) - x =60km -45 km = 15 km

Explanation:

6 0
3 years ago
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