Physics, 30.01.2020 07:48 oddoneshenchman

Asports car accelerate from rest to 26.8 m/s (roughly. 60 mi/h) in 5.1 second. what is the acceleration of the car?

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Answer from: Alreef8468

The acceleration of the sports car is 5.25 m/s²

From the question,

A sport car accelerate from rest to 26.8 m/s.

Since, the car accelerates from rest, then the initial velocity, u, is 0 m/s.

From one of the equations of kinematics for linear motion

v = u + at

Where v is the final velocity

u is the initial velocity

a is the acceleration

and t is the time

From the question,

u = 0 m/s

v = 26.8 m/s

t = 5.1 secs

a = ?

Put the above parameters into the equation

v = u + at

Then,

26.8 = 0 + (a × 5.1)

26.8 = 5.1a

∴ a = 26.8 ÷ 5.1

a = 5.25 m/s²

Hence, the acceleration of the sports car is 5.25 m/s²

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Answer from: Damani14

The acceleration of that sports car is $5.26 ms^{-2}$ .

Explanation:

Acceleration is defined as the rate of change of velocity of an object.

We can measure acceleration using the change is speed per unit time.

Given is the initial speed, the final speed of the car and the time taken for the car to accelerate to that speed.

Finding acceleration:

Acceleration = Change is speed/Time taken

Acceleration = (Final speed - Initial speed)/ Time

Acceleration = (26.8 - 0)/ 5.1

$Accelation = 5.255 ms^{-2}$

$Accelation = 5.26 ms^{-2}$

Answer from: Quest

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm. the wire diameter is d = 0.9 mm. the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2) in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

Answer from: Quest

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

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Asports car accelerate from rest to 26.8 m/s (roughly. 60 mi/h) in 5.1 second. what is the accelerat...