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3 years ago

What is the net force on this object A: 0 newtons b: 200 newtons c:400 newtons D:600 newtons

Physics

1 answer:

Ilya [14]3 years ago

8 0

Answer:

100kg

Explanation:

Total force =400N+600N=1000N

As we have,

F=m×g

1000N=m×10m/s²

1000N÷10m/s²=m

m=100kg

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A car starts from rest and after 10 seconds is traveling at 20 m/s. Assuming that it continues to accelerate at the same rate it

Alenkinab [10]

Assuming that it continues to accelerate at the same rate it will take another 10 seconds to reach 40 m/s.

Answer:

Explanation:

Since the first question states that there is a change in the velocity from rest to 20 m/s in 10 seconds time interval. So the acceleration experienced by the car during this 10 seconds should be determined first as follows:

Acceleration = (final velocity-initial velocity)/Time

Acceleration = (20-0)/10 = 2 m/s².

So this means the car is traveling with an acceleration of 2 m/s².

As it is stated that the car continues to move with same acceleration, then in the second case, the acceleration is fixed as 2 m/s², initial velocity as 20 m/s and final velocity as 40 m/s. So the time taken for the car to reach this velocity with the constant acceleration value will be as follows:

Time = Change in velocity/Acceleration

Time = (40-20)/2 = 20/2=10 s

So again in another 10 seconds by the car to reach 40 m/s from 20 m/s. Similarly the car will take a total of 20 seconds to reach from rest to 40 m/s value for velocity.

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4 years ago

A car is traveling West on Old Milton Parkway at 100 km/hr when the driver spots a police cruiser in the bushes. The driver hits

Alisiya [41]

The answer is option C) The car experienced negative acceleration with velocity in the positive direction.

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3 years ago

Estefan has determined his BMI at 31. Explain how he can apply the FITT training principles to improve his body composition.

-BARSIC- [3]

Frequency:

Cardio : Five or more
HIIT: 5 or 4

Strength: 2-3 days on non-consecutive days a week

Intensity:
How hard you work during the session

For cardio : workout at your target heart rate.
For HIIT: varying intensity from high to low or rest ( no slow pace)
For strength: you should lift enough weight to complete the needed number of reps and sets.

Time:

For cardio 30- 60 min
For HIIT 45 min (short periods of bursts followed by rest)

For strength depends on the amount of weight.

Type:

Either cardio, HIIT or strength training (resistance training)

NOTE: This info is given by an unqualified brofessor, who uses his hard gained bro-science in the expense of scientific facts to solve others broblems.

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4 years ago

What type of tide occurs when the Sun, Earth and Moon are aligned with one another?

nlexa [21]

Answer:

spring tides

Explanation:

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3 years ago

Read 2 more answers

A proton with a velocity in the positive x-direction enters a region where there is a uniform magnetic field B in the positive y

Daniel [21]

Answer:

Negative z-direction

Explanation:

The direction of the force exerted by the magnetic field on a moving (positive) charged particle can be found by using the right-hand rule:

- The index finger corresponds to the direction of the velocity of the particle

- The middle finger corresponds to the direction of the magnetic field

- The thumb gives the direction of the force

For the proton in this problem:

- Index finger: positive x-direction (direction of the velocity)

- Middle finger: positive y-direction (direction of magnetic field)

- Thumb: positive z-direction (direction of the force)

So, the magnetic force on the proton acts in the positive z-direction.

The electric force on a positive charged particle, instead, has the same direction as the electric field.

In this problem, in order to balance the magnetic force, we have to apply an electric force in the negative z-direction: therefore, the electric field must be in the negative z-direction as well, so that the proton will continue along a straight line.

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4 years ago