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labwork [276]
3 years ago
6

An object is dropped on Earth from a height of 15 m. What is the magnitude of the velocity of the object just as it hits the gro

und?
0 m/s
4.4 m/s
9.8 m/s
17 m/s
Physics
2 answers:
ivolga24 [154]3 years ago
8 0
Here, we know, according to 3rd Equation of Kinematics, 
v² - u² = 2as

Here, u = 0  [ Free fall ]
a = 9.8 m/s² [ constant value for the Earth system ]
s = 15 m

Substitute their values, 
v² - 0² = 2 * 9.8 * 15
v² = 294
v = √294
v = 17.15 m/s

In short, Your Answer would be Option D

Hope this helps!
Tamiku [17]3 years ago
6 0

Answer:

option D

Explanation:

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Explanation:

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3 years ago
A 49 kg person is being dragged in their sleeping bag to the lake by a 593 N
crimeas [40]

Answer:

f = 485.62 N

Explanation:

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But, from Newtons Second Law of Motion:

Unbalanced Force = ma

comparing the equations:

ma = Fx - f

f = F Cos θ - ma

where,

f = frictional force  = ?

F = Applied force  = 593 N

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a = acceleration = 0.57 m/s²

θ = Angle with horizontal = 30°

Therefore,

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6 0
3 years ago
An object is dropped from a platform 100 feet high. Ignoring wind resistance, what will its speed be when it reaches the ground?
Scorpion4ik [409]

Answer:

80 ft/s

Explanation:

Use III equation of motion

V^2 = U^2 + 2g h

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8 0
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Hi, I need your help with this Physics exercise, I hope you can help me A pulse moving to the right along the x axis is represen
igomit [66]

Answer:

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