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wariber [46]
3 years ago
11

If you drop a bowling ball, a tennis ball, and a feather from the top of a tall building at the same time which one will hit the

ground first?
( in the absence of air resistance)
A. the bowling ball
B. the tennis ball
C.the feather
D.they will all hit the ground at the same time
E.it is not possible to predict
Physics
2 answers:
Whitepunk [10]3 years ago
6 0
In the absence of air resistance the result is D .
mario62 [17]3 years ago
6 0

Answer:

If we Drop any object there is gravity acts on it and the air resistance but since, we are given the condition in absence of air resistance

So, we will consider only the gravity and due to gravity all the three bowls bowling ball, a tennis ball, and a feather from the top of a tall building will hit the ground at same time.

Hence, The option D is correct.

Option A,B,C and E are discarded.

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A 6 N and a 10 N force act on an object. The moment arm of the 6 N force is 0.2 m. If the 10 N force produces five times the tor
Levart [38]

Answer:

The moment arm is 0.6 m

Explanation:

Given that,

First force F_{1}=6\ N

Second force F_{2}=10\ N

Distance r = 0.2 m

We need to calculate the moment arm

Using formula of torque

\tau=Force\times lever\ arm

So, Here,

\tau_{2}=5 \tau_{1}

We know that,

The torque is the product of the force and distance.

Put the value of torque in the equation

F_{2}\times d_{2}=5\times F_{1}\times r_{1}

r_{2}=\dfrac{5\times F_{1}\times r_{1}}{F_{2}}

Where, F_{1}=First force

F_{1}=First force

F_{2}=Second force

r_{1}= distance

Put the value into the formula

r_{2}=\dfrac{5\times6\times0.2}{10}

r_{2}=0.6\ m

Hence, The moment arm is 0.6 m

6 0
3 years ago
What kind of charge does an object have when it has given away electrons?
Step2247 [10]
Electrons have a negative charge, so if you give away electrons, you give away negative charge, thus ending with a positive charge.
6 0
3 years ago
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A football wide receiver rushes 16 m straight down the playing field in 2.9 s (in the positive direction). He is then hit and pu
Bumek [7]

Answer:

a) v1 = 5.52m/s

b) v2 = -1.52m/s

c) v3 = 4.62m/s

d) vt = 3.85m/s

Explanation:

The velocity of the football wide receiver is his displacement per unit time.

Velocity v = (displacement d)/time t

v = d/t .....1

For each of the cases, equation 1 would be used to calculate the velocity.

a) v1 = d1/t1

d1= 16m

t1 = 2.9s

v1 = 16m/2.9s

v1 = 5.52m/s

b) v2 = d2/t2

d2 = -2.5m

t2 = 1.65s

v2 = -2.5/1.65

v2 = -1.52m/s

c) v3 = d3/t3

d3 = 24m

t3 = 5.2s

v3 = 24/5.2

v3 = 4.62m/s

d) vt = dt/tt

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tt = 2.9 + 1.65 + 5.2 = 9.75s

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5 0
3 years ago
How is the lifetime of a star related to its mass?
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6 0
3 years ago
7. Which law describes when a person lands on a
marissa [1.9K]

Answer:

Newton's Third Law

Explanation:

Newton's third law

Newton's third law: “for every action, there is an equal and opposite reaction.” This is where you get the bounce. When you push down on the trampoline (or fall downward onto the trampoline bed), Newton's third law says that an equal and opposite reaction pushes back.

:)

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3 years ago
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