1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sav [38]
3 years ago
15

Harry and Hagrid needed to get money out of Gringotts bank. The bank cart was accelerating at a rate of 4 m/s2 and it had a mass

of 8,000 kg. What is the net force acting on the cart?
USE THE FORMULA: F=m∙a Show all your work!
Physics
1 answer:
Nutka1998 [239]3 years ago
8 0

a = acceleration of the bank cart = 4 m/s²

m = mass of the bank cart = 8000 kg

F = net force on the cart

According to newton's second law , Net force is the product of mass of the object and the acceleration of the object.

Net force = mass x net acceleration

hence Net force acting on the cart is given as

F = ma

F = 8000 x 4

F = 32000 N

hence the net force acting on the cart comes out to be 32000 N


You might be interested in
A ball is thrown vertically upward with an initial velocity of 29.4 m/s². What is the maximum height reached by the ball? How lo
Elena L [17]

Answer:

Most likely it will reach 29.4 up in the air before coming back down.

Explanation:

The force of the ball will be the same on how high it will go.

4 0
3 years ago
How does a distance-time graph show you which direction the runner is moving? Use your own words and science vocabulary.
Dmitry [639]

In a distance time graph, when the x and y values are positive (in first quadrant), the runner is moving forward.

While, if the distance value ( in the y axis) is negative, the runner is moving backwards ( towards the start) .

Hope it helps :)

8 0
3 years ago
An 850-lb force is applied to a 0.15-in. diameter nickel wire having a yield strength of 45,000 psi and a tensile strength of 55
Sindrei [870]

Answer:

a)Yes will deform plastically

b) Will NOT experience necking

Explanation:

Given:

- Applied Force F = 850 lb

- Diameter of wire D = 0.15 in

- Yield Strength Y=45,000 psi

- Ultimate Tensile strength U = 55,000 psi

Find:

a) Whether there will be plastic deformation

b) Whether there will be necking.

Solution:

Assuming a constant Force F, the stress in the wire will be:

                       stress = F / Area

                       Area = pi*D^2 / 4

                       Area = pi*0.15^2 / 4 = 0.0176715 in^2

                       stress = 850 / 0.0176715

                       stress = 48,100.16 psi

      Yield Strength < Applied stress > Ultimate Tensile strength

                        45,000 < 48,100 < 55,000

Hence, stress applied is greater than Yield strength beyond which the wire will deform plasticly but insufficient enough to reach UTS responsible for the necking to initiate. Hence, wire deforms plastically but does not experience necking.

6 0
3 years ago
19. When baking soda and vinegar are combined, the result is a salt called sodium acetate. This forms
Orlov [11]
It is a chemical change because the baking soda and vinegar are reacting to form a new product.
3 0
3 years ago
Calculate (a) the torque, (b) the energy, and (c) the average power required to accelerate Earth in 4.0 days from rest to its pr
natima [27]
<h2>Answer:</h2>

Torque = <em>2.05 x 10²⁸ Nm</em>

Energy = <em>3.54 x 10³³ J</em>

Average power = <em>1.02 x 10²⁸ W</em>

<h2>Explanation:</h2>

(a) Torque (τ) is the rotational effect of a given force.  

It is given by

τ = I x α          -------------(i)

Where;

I = rotational inertia of the object

α = angular acceleration of the object.

In this case, the object is the Earth. Therefore,

I = 9.71 x 10³⁷ kg m²

α = ω / t

Where;

ω = angular velocity of earth = 2π rad / day

<em>Since </em>

<em>1 day = 24 hours and 1 hour = 3600seconds</em>

<em>1 day = 24 x 3600 seconds = 86400seconds</em>

<em>=> ω = 2π rad / 86400seconds</em>

<em>=> ω = 7.29 × 10⁻⁵ rad/s</em>

<em />

t = 4 days = 4 x 24 x 3600 seconds = 345600 seconds

=> α = ω / t

=> α = 7.29 × 10⁻⁵ / 345600

=> α = (7.29 × 10⁻⁵) / (3.456 x 10⁵)

=> α = (7.29 × 10⁻⁵⁻⁵) / (3.456)

=> α = (7.29 × 10⁻¹⁰) / (3.456)

=> α = 2.11 × 10⁻¹⁰ rad/s²

Now substitute the values of I and α into equation (i)

τ = 9.71 x 10³⁷ x 2.11 × 10⁻¹⁰

τ = 9.71 x 10²⁷ x 2.11

τ = 20.5 x 10²⁷ Nm

τ = 2.05 x 10²⁸ Nm

(ii) The energy (rotational energy) E is given by;

E = \frac{1}{2} x I x ω

E = \frac{1}{2} x 9.71 x 10³⁷ x 7.29 × 10⁻⁵

E = 35.4 x 10³² J

E = 3.54 x 10³³ J

(iii) The average power P, is given by;

P = E / t

P = 3.54 x 10³³ / 345600

P = 1.02 x 10²⁸ W

5 0
3 years ago
Other questions:
  • Radiation can travel through _______ making it different from convection and conduction
    7·1 answer
  • A person is driving down a country lane at 25 m/s, when a deer suddenly jumps in front of the car. The deer is 75 m ahead and wh
    10·2 answers
  • The position of a particle in millimeters is given by s = 133 - 26t + t2 where t is in seconds. Plot the s-t and v-t relationshi
    5·1 answer
  • Chuck and Jackie stand on separate carts, both of which can slide without friction. The combined mass of Chuck and his cart, mca
    7·1 answer
  • 1200 kg car is being driven down a road. If it has 101 kJ of kinetic energy, what is its speed?
    11·1 answer
  • What is the mechanism that allows species to change over time?
    13·1 answer
  • Use a variation model to solve for the unknown value. Use as the constant of variation. The stopping distance of a car is direct
    8·1 answer
  • (b) Which statement about beta radiation is true?
    15·1 answer
  • When a scientific calculator shows the quantity below, what does it mean?<br> 1.5E8
    7·1 answer
  • HELPPP PLEASE QUICk :(
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!