Physics, 21.12.2019 09:31, Marqiuse412

1. if average acceleration is calculated using the equation, “change in velocity/change in time,” what is an objects acceleration if it’s velocity is 24cm/s at 3s? be sure to include units in your math work and in your final answer.

2. use the graph below to answer the following question: if average acceleration is calculated using the equation, “change in velocity/change in time,” what is an objects acceleration at 4s? be sure to include units in your math work and in your final answer.

1. if average acceleration is calculated using the equation, “change in velocity/change

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answered: lolyourenotpoppunk

1. 8cm/s²

2. 9cm/s²

Explanation:

1. Use equation for acceleration: a=(V2-V1)/t

V1 Speed on start

V2 speed on finish

V1=0 m/s

V2=24cm/s=0.24m/s

t=3s

a=(0.24m/s-0m/s)/3s

a=0.24m/s/3s

a=0.08m/s²=8cm/s

2.Use equation for acceleration: a=(V2-V1)/t

V1 Speed on start

V2 speed on finish

V1=0cm/s

V2=36cm/s

t=4s

a=(36cm/s-0cm/s)/4s

a=36cm/s/4s

a=9cm/s²

answered: Guest

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:

answered: Guest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.