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3 years ago

A woman lifts her 150 N child up one meter and carries her for a distance of 50 meters to the

Physics

1 answer:

Cloud [144]3 years ago

3 0

7500J

Explanation:

Given parameters:

Weight of child = 150N

Height of lifting = 50m

Distance = 50m

Unknown:

Work done by the woman = ?

Solution:

Work done by a body is the force applied to move a body through a given distance.

Work done = Force x distance

Weight is a force impacted by the mass of a body and the gravity on it.

input the parameters:

Work done = 150 x 50 = 7500J

learn more:

Work done brainly.com/question/9100769

#learnwithBrainly

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A dog is 10 m from a cat, whose speeds are 6 and 5 m / s, respectively. What time does the dog require to catch the cat?

scoray [572]

Answer:

10 seconds

Explanation:

because the cat is moving one m/s slower than the dog, the dog has a relative speed of 1 m/s. 10 meters would take 10 seconds for the dog to cover

4 0

4 years ago

Which of Newton’s laws explains why your hands get red when you press them hard against a wall.

ANTONII [103]

Answer:

Newton's third law, if i'm not mistaken.

Explanation:

Any action that occurs will have a opposite and equal action. The greater the force u apply to the wall, the greater the force the wall exerts back at you, hence why ur hands become red if u try pushing extremely hard on the wall.

6 0

3 years ago

a box has a length of .5 m and a width of .1m. if the box exerts a force of 10 N on the floor, what is the pressure of the box o

faust18 [17]

Answer:

The pressure of the box on the floor is 200 Pa

Explanation:

Given,

Length of the box=0.5m

Width of the box= 0.1m

∴Area of the box, A= (0.5 X 0.1) sq.m

= 0.05 sq.m

We know,

Pressure, P= F/A

= 10/0.05 Pa

= 200 Pa

∴The pressure of the box on the floor is 200 Pa

4 0

2 years ago

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. A r

Illusion [34]

Answer:

the weight of the rider is 493.53 N

Explanation:

Given the data in the question and as illustrated in the image below,

Tension T = 1900 N

the rider is moving at a constant speed so the net force in the horizontal direction will be 0

In the horizontal direction

F $_{sail$ cos( 30° ) = Tcos ( 17° )

F $_{sail$ = Tcos( 17° ) / cos( 30° )

F $_{sail$ = 1900cos( 17° ) / cos( 30° )

F $_{sail$ = 2098.07 N

Now, In the vertical direction,

F $_{sail$ sin( 30° ) = W + T sin( 17° )

W = F $_{sail$ sin( 30° ) - T sin( 17° )

W = 2098.07sin( 30° ) - 1900sin( 17° )

W = 1049.035 - 555.506

W = 493.53 N

Therefore, the weight of the rider is 493.53 N

7 0

3 years ago

Match the words givne below to the appropriate blanks in the sentences on the right. Make certain each sentence is complete befo

Pepsi [2]

Answer: forward

The child will continue to move forward at the before the crash speed. This is because the child at the instant of head on collision of the car will tend to continue the state of uniform motion the car exhibited as newton's first law states. Newtons first law: A body will continue to be at rest or in uniform motion with constant velocity/speed unless acted upon by an external force.

Explanation:

The child will continue moving forward until he/she encounters some obstruction or resistance which could be dangerous. In a safety design car, the child should collide with the SRS airbag right in front which gets activated for situations where the acceleration of the car is above 250m/s².

Thank you for reading and I hope this was helpful.

6 0

4 years ago