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3 years ago

An 12 N force is applied to a 1 kg object. What is the magnitude of the objects acceleration?

Physics

1 answer:

Sauron [17]3 years ago

6 0

Answer:

a=12 m/s²

Explanation:

Newton's second law of motion states that the acceleration of a body is directly proportional to the force applied and takes place in the direction of force.

This can be summarized as: F=ma, where m is the mass of the object on which force F acts. a is the acceleration due to the force applied.

12N= 1kg×a

a=12N/1kg

a=12m/s²

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. While a person lifts a book of mass 2 kg from the floor to a tabletop, 1.5 m above the floor, how much work does the the perso

viktelen [127]

Answer:

a) 29.4 J

b) - 29.4 J

Explanation:

Given:

Mass of the book, m = 2 kg

Height above the floor, h = 1.5 m

Now,

the work done by the person will be = Force applied on the book × displacement of the book

thus,

Work done by the person = mg × h

where, g is the acceleration due to gravity

thus, on substituting the values, we get

Work done by the person = 2 × 9.8 × 1.5 = 29.4 J

now,

for the force applied by the gravitational pull (downwards) the displacement is in opposite direction (upwards) to the force of the gravity.

Thus,

work done by the gravity will be negative

therefore, the work done by the gravity = - mg × h

work done by the gravity = - 29.4 J

5 0

3 years ago

Read 2 more answers

Technician A says that current is created in the stator windings of an alternator. Technician B says that the voltage regulator

drek231 [11]

Answer:

Technician A and Technician B both are right.

Explanation:

In an AC alternator, there are two windings

1. Stator winding (stationary)

2. Rotor winding (rotating)

The current is induced in the stationary coils due to the magnetic field produced by the rotor. The DC suppy is provided to the rotor winding via slip rings and brushes and a voltage regulator precisely controls this supply to control the current flow through the rotor.

Therefore, both technicians are right.

4 0

3 years ago

A 5 kg bowling ball with a velocity of +10 m/s collides with a stationary 2 kg bowling pin. If the ball's final velocity is +8 m

Whitepunk [10]

Answer:

<h2>The pin's final velocity is 5m/s</h2>

Explanation:

Step one:

given data

mass of ball m1=5kg

initial velocity of ball u1=10m/s

mass of pin m2=2kg

initial velocity of pin u2= 0m/s

final velocity of ball v2=8m/s

final velocity of pin v2=?

Step two:

The expression for elastic collision is given as

m1u1+m2u2=m1v1+m2v2

substituting we have

5*10+2*0=5*8+2*v2

50+0=40+2v2

50-40=2v2

10=2v2

divide both sides by 2

v2=10/2

v2=5m/s

The pin's final velocity is 5m/s

3 0

3 years ago

What will happen to the wavelength of light uf the frequency is doubled?What will happen to the wavelength of light uf the frequ

otez555 [7]

Answer:

if the frequency is double, the wavelength is only half as long

Explanation:

6 0

2 years ago

A circular coil 14.0 cm in diameter and containing nine loops lies flat on the ground. The Earth's magnetic field at this locati

sp2606 [1]

Answer:

a) $T = 2.9*10^{-5} N-m$

b) north edge will rise up

Explanation:

torque on the coil is given as

$T = NIABsin\theta$

where N is number of loop = 9 loops

i is current = 7.80 A

-B -earth magnetic field = $5.00*10^{-5} T$

A- area of circular coil

$A = \frac{\pi d^{2}}{4}$

$A =\frac{\pi .14^{2}}{4}$

A =0.015 m2

PUTITNG ALL VALUE TO GET TORQUE

$T = 9*7.8*0.015*5*10^{-5} sin{90-56}$

$T = 2.9*10^{-5} N-m$

b) north edge will rise up

3 0

3 years ago

Read 2 more answers