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3 years ago

Physics question: Momentum

Physics

1 answer:

Tomtit [17]3 years ago

5 0

<span>The quantity of motion of a moving body, measured as a product of its mass and velocity.</span>

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1 ) when a ball is projected upwords its time of rising is ...............the time of falling .

balu736 [363]

Answer:

correct answer is C

Explanation:

In this exercise, you are asked to complete the sentences so that the sentence makes sense.

1) in projectile launching, the only force that acts is gravity in the vertical direction, so the time of going up is EQUAL to the time of going down

correct answer C

2) when a body falls freely, the acceleration is the ratio of gravity, therefore if it starts from rest, its height is

y = v₀ t - ½ gt²

v₀ = 0

y = -1/2 g t²

so the position is not proportional to the square of the time

correct answer is C

5 0

3 years ago

A basketball with mass of 0.8 kg is moving to the right with velocity 6 m/s and hits a volleyball with mass of 0.6 kg that stays

IceJOKER [234]

Answer:

26.67 m/s

Explanation:

From the law of conservation of linear momentum, the initial sum of momentum equals the final sum.

p=mv where p is momentum, m is the mass of object and v is the speed of the object

Initial momentum

The initial momentum will be that of basketball and volleyball, Since basketball is initially at rest, its initial velocity is zero

$p_i= m_bv_b+m_vv_v=8*6+0.6*0=48 Kg.m/s$

Final momentum

$p_f= m_bv_b+m_vv_v=8*4+0.6*v_v=32+0.6v Kg.m/s\\32+0.6v_v=48\\0.6v=16\\v_v=16/0.6=26.66666667\approx 26.67 m/s$

4 0

3 years ago

Why should people pay attention to scientists when making decisions? A)scientist are the smartest people B) Scientist make up fa

MrRa [10]

Answer:

C) scientist use experiments to test their ideas

3 0

4 years ago

Read 2 more answers

A 5kg baby is asleep in a 5kg stroller. The mom is speed walking in the park at 3m/s. How much momentum does she generate with t

lesya [120]

Answer:

The correct solution is "15 kgm/s". A further explanation is given below.

Explanation:

The given values are:

Mass,

m = 5 kg

Velocity,

v = 3 m/s

By applying the formula of momentum, we get

⇒ $P=m v$

On substituting the given values, we get

⇒ $=5\times 3$

⇒ $=15 \ kgm/s$

6 0

3 years ago

Which statement describes the molecules and a reaction once it reaches equilibrium

shepuryov [24]

Answer:

A: They maintain stable concentrations.

Explanation:

Hopefully this helps!

4 0

3 years ago