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3 years ago

5.17 System of blocks acceler-ates. A experiences friction. drawaA :aB

Physics

1 answer:

lys-0071 [83]3 years ago

7 0

Answer:

A block is pulled along a horizontal surface (with friction) by a con- stant force with magnitude Fx, and the acceleration ax is measured. The experiment is repeated ...

Explanation:

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A motorbike accelerates from 15m/s to 25m/s in 15 seconds.

RSB [31]

distance traveled by a uniformly accelerated bike is given as

$d = \frac{v_f + v_i}{2} (t)$

here we know that

$v_f = 25 m/s$

$v_i = 15 m/s$

$t = 15 s$

now we will have from above equation

$d = \frac{15 + 25}{2} (15)$

$d = 20 (15) = 300 m$

so it will cover the total distance of 300 m

5 0

3 years ago

What is the value of R2 in this parallel circuit? (5 stars)

o-na [289]

Answer:

20 Ω

Explanation:

Voltage, current, and resistance are related by Ohm's law:

V = IR

40 V = (4 A) R

R = 10 Ω

The total resistance of the circuit is 10 Ω.

Resistors in parallel have a total resistance of:

1/R = 1/R₁ + 1/R₂

1 / (10 Ω) = 1 / (20 Ω) + 1/R₂

R₂ = 20 Ω

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2 years ago

A bicycle takes 8.0 seconds to accelerate at a constant rate from rest to a speed of 4.0 m/s. If the mass of the bicycle and rid

Inessa05 [86]

Acceleration = (change in speed) / (time for the change)
Acceleration = (4 m/s) / (8 seconds)
Acceleration = 0.5 m/s²

Force = (mass) x (acceleration)
Force = (85 kg) x (0.5 m/s²)
Force = 42.5 Newtons

4 0

3 years ago

Read 2 more answers

What is the correct reason for blinking / flickering of stars? Explain it.

Rzqust [24]

Answer:

d. changing refractive index of gases in the atmosphere

Explanation:

light from a star passes through the atmosphere to reach our eyes. however, the layers of gases in the atmosphere are in constant motion, so the light gets bent and appears to be flickering.

i hope this helps! :D

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2 years ago

Josh manages security at a power plant. The facility is sensitive, and security is very important. He would like to incorporate

Studentka2010 [4]

Question: Josh manages security at a power plant. The facility is sensitive, and security is very important. He would like to incorporate two-factor authentications with physical security. Which of the options below is the best way to meet this requirement? A) Smart cards B) A mantrap with a smart card at one door and a pin keypad at the other door C) A mantrap with video surveillance D) A fence with smart card gate access Answer: The correct answer is (B) A mantrap with a smart card at one door and a pin keypad at the other door Explanation: Multi-factor access control systems are access control systems that authorises access only after more than one piece of evidence is presented to authenticate a user. The mechanisms used in multi-factor authentication include 1. Knowledge (something the user and only the user knows), 2. Possession (something the user and only the user has), and 3. Inherence (something the user and only the user is). A two-factor authentication system uses two of these mechanisms to grant or deny access. An authentication system that uses a mantrap with a smart card (possession) on one door and a pin keypad (knowledge ) on the other door is a two factor authentication system.

8 0

3 years ago

5.17 System of blocks acceler-ates. A experiences friction. drawaA :aB​

5.17 System of blocks acceler-ates. A experiences friction. drawaA :aB