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3 years ago

What is the acceleration of a rocket ship that takes 5.0 seconds to increase its speed from 1240 m/s to 1300 m/s?

Physics

2 answers:

8090 [49]3 years ago

5 0

Answer:

$\boxed{\text{\sf \Large 12 m/s^2 $}}$

Explanation:

Use acceleration formula

$\displaystyle \text{$ \sf Acceleration=\frac{Change \ in\ velocity}{Time \ taken} $}$

$\displaystyle a=\frac{1300-1240}{5.0} =12$

LUCKY_DIMON [66]3 years ago

4 0

Answer:

12 m/s²

Explanation:

Acceleration = change in velocity / time

a = (1300-1240) / 5

a = 60 / 6

a = 12

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A robot arm that controls the position of a video camera in an automated surveillance system is manipulated by a servo motor tha

lesya [120]

Answer:

W = 270.9 J

Explanation:

given,

F(x) = (12.9 N/m²) x²

work = Force x displacement

dW = F .dx

the push-rod moves from x₁= 1 m to x₂ = 4 m

integrating the above

$\int dW = \int_{x_1}^{x_2}F. dx$

$W = \int_{x_1}^{x_2}F. dx$

$W = \int_{1}^{4} (12.9 x^2) dx$

$W = 12.9\times [\dfrac{x^3}{3}]_1^4 dx$

` $W = 12.9\times [\dfrac{4^3}{3}-\dfrac{1^3}{3}] dx$

W = 270.9 J

work done by the motor is W = 270.9 J

6 0

3 years ago

The purpose of a fuse or circuit breaker is _____.

ExtremeBDS [4]

What a sloppy question ! The purpose of a fuse or circuit breaker is to shut down the circuit when current reaches a magnitude indicating danger due to a serious malfunction. When current IS flowing in the circuit, it's always flowing at the same speed.

3 0

3 years ago

Read 2 more answers

Which of the following is the best reason for using a scanning electron microscope?

torisob [31]

Answer is C: Ability to see three-dimensional images of the surfaces of object

Explanation:

To enable the technician see fractures and broken particles in a better resolution as the SEM sees the peaks and valley of the structure.

8 0

3 years ago

What is the ideal banking angle (in degrees) for a gentle turn of 2.00 km radius on a highway with a 125 km/h speed limit (about

nikitadnepr [17]

An "ideal" banking angle assumes no friction is required to keep a car on the road as it turns. Let θ denote the banking angle, and consult the attached free-body diagram for a car making the turn. There are only 2 relevant forces acting on the car,

• the normal force with magnitude n

• the car's weight with magnitude w

and the net force points toward the center of the circle made by the turn, with centripetal acceleration

a = (125 km/h)² / (2.00 km) = 7812.5 km/h² ≈ 0.603 m/s²

Split up the forces into components acting perpendicular (⟂) and parallel (//) to the banked curve, so that by Newton's second law,

∑ F (⟂) = N + W (⟂) = m a (⟂)

and

∑ F (//) = W (//) = m a (//)

Let the direction of N be the positive perpendicular axis, and down the incline and toward the center of the circle the positive parallel axis. The net force vector and acceleration both make an angle θ with the banked curve, and W makes the same angle with the negative perpendicular axis, so that the equations above reduce to

N - m g cos(θ) = m a sin(θ)

and

m g sin(θ) = m a cos(θ)

The second equation is all we need at this point to find the ideal θ. The mass m cancels out, and we can solve for θ to get

tan(θ) = a/g ≈ (0.603 m/s²) / (9.80 m/s²) ≈ 0.0615

→ θ ≈ 3.52°

8 0

4 years ago

(AKS 1c) A bowler rolls a bowling ball with a speed of 4 m/s. It took 2s to reach the pins at the end of the lane. What is the f

Advocard [28]

Answer:

B is the answer

Explanation:

When A is divided by 7x, it multiplies to0.81

6 0

3 years ago