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Stels [109]
3 years ago
10

A 1.3-kg ball is attached to the end of a 0.8-m string to form a pendulum. This pendulum is released from rest with the string h

orizontal. At the lowest point of its swing, when it is moving horizontally, the ball collides with a 0.6-kg block initially at rest on a horizontal frictionless surface. The speed of the block just after the collision is 2.2 m/s. What is the speed of the ball just after the collision
Physics
1 answer:
Natali5045456 [20]3 years ago
3 0

Answer:

2.9 m/s

Explanation:

Momentum will be conserved

Speed of the ball just before collision is

v = √2gh = √(2(9.8)(0.8)) = 3.96 m/s

The initial momentum is 1.3(3.96) = 5.15 kg•m/s

The block takes away momentum of 0.6(2.2) = 1.32 kg•m/s

Leaving the ball with momentum of 5.15 - 1.32 = 3.83 kg•m/s

vf(ball) = 3.83 / 1.3 = 2.946... ≈ 2.9 m/s

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The force component along the displacement varies with the magnitude of the displacement, as shown in the graph. (a) 0 to 1.0 m,
Lina20 [59]
Work is force*displacement if the force and displacement is parallel. 


a. You can average the force over the distance so W = Fave*d 

<span>b The force part of that multiplication is zero. </span>

<span>c. You can form the average force for the interval from 2 to 3 and find the work for that section and then consider the interval from 3 to 4, find the work and add the 2 work results.


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The info below shows three kettles with their powers and the time they take to boil 500cm3 of water. If electricity costs 9p per
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The cost of boiling 500 cm³ of water using the 3 KW Kettle is 1.35p

<h3>What is power? </h3>

This is defined as the rate in which energy is consumed. Electrical power is expressed mathematically as:

Power (P) = Energy (E) / time (t)

P = E / t

<h3>How to determine the energy</h3>
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  • Time (t) = 3 mins = 3 / 60 = 0.05 h
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E = Pt

E = 3 × 0.05

E = 0.15 KWh

<h3>How to determine the cost</h3>
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Cost = Energy × cost per unit

Cost = 0.15 × 9

Cost = 1.35p

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brainly.com/question/64224

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Where must an object be placed to form an image 30.0 cm from a diverging lens with a focal length of 43.0 cm?
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How many total atoms in the chemical formula CaCO2?
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