Imagine a person riding in an elevator that is just leaving the top floor and picks up speed for 3 seconds until it reaches its maximum cruising speed and holds it for another 4 seconds. While riding this elevator, the person is also standing on a bathroom scale that reads 830 N for the first 3 seconds, and then it reads 930 N for the last 4 seconds. What is the elevator’s velocity at the end of this 7 seconds of motion

Q: A truck weighing 5 kips is traveling with a constant velocity of 55 mph when brakes are applied…

A: Weight of the truck, w=5 kips The velocity of the car, v=55 mph Breaking force, F=2 kips The…

Q: In the figure below, a box of Cheerios (mass mc = 1.6 kg) and a box of Wheaties (mass mw = 2.4 kg)…

A: Mass of the Cheerios box is m = 1.6 kg Mass of the Wheaties box is M = 2.4 kg Friction force acting…

Q: What is the normal force exerted by an elevator on 55kg person if the elevator is moving upward at a…

A:

Q: A 10 kg wagon is pulled with a horizontal force of 10N. If the sidewalk offers 4N of resistance,…

A:

Q: In experiment 101, the hover puck has a mass of 1,475 g, photogate 1 is at the 20-cm mark, photogate…

A: In this question we have to find the acceleration of the hover puck. Please give positive feedback…

Q: A 3 kg block is moving at a speed of 3.87 m/s. What is the force required to bring the block to a…

A: Given data:  Mass (m) = 3 kg Initial velocity (Vi) = 3.87 m/s Final velocity (Vf) = 0 m/s Time…

Q: What is the magnitude of the net force needed to bring a 2085 kg car to rest from 25.6 m/s in 9.3…

A: Solution: Given that mass m= 2085 kg vinitial = 25.6 m/s time t = 9.3 s to find the force required

Q: on aircraft carriers, catapults are used to accelerate aircraft to flight speeds in a short…

A: The acceleration of the jet is, a=v-ut=70 m/s-0 m/s2.5 s=28 m/s2

Q: A 1.0-kilogram book rests on a horizontal tabletop. The magnitude of the force of the tabletop on…

A:

Q: A 75 kg P1020 student standing on a scale in an elevator looks down at the scale and notes that the…

A: We know that net force acting on an mass is given as  Fnet=ma

Q: A force of 36 Newtons causes an object to accelerate from rest to a speed of 12 m/s in 6.0 seconds.…

A: Given data:  Force (F) = 36 N Initial velocity (u) = 0 m/s Final velocity (v) = 12 m/s Time (t) =…

Q: A boat with mass of 2.6 * 10° kg is traveling at 1.5 * 10' m/s. What is the magnitude of the force…

A:

Q: A flowerpot falls from the Physics building and it hits the ground 45 m below. It hits the ground…

A: Distance " s"= 45 m   d ue to gravity acceleration. = "g" = 9.8m/s²

Q: A force of 36 Newtons causes an object to accelerate from rest to a speed of 12 m/s in 6.0 seconds.…

A: Given  Force F=36 N Final speed v=12m/s time t=6s

Q: It takes 4 hours for a boater to travel 15 miles upstream and back. If the speed of the boat in…

A:

Q: Pedro   who  is  on  top  of  a roof  of  a  high  building  drops  a  piece  of  metallic material.…

A: Solution:           for the second object using                   v² = u ² + 2as2 where          v =…

Q: What is the mass of the object that weighs 44.1 N?  a. 4.50 g b. 4,500 g c. 0.00450 kg d. 450.…

A: Given Data:- The weight of the object is W = 44.1 N

Q: "The net force acting on an object equals the product of the mass and the acceleration of the…

A: There is a statment given, we need to tell this statement is related to which law.

Q: A 50 kg astronaut on a space-walk pushes with a force of 50 N against a satellite that has a mass of…

A: Given quantities: Mass of the astronaut (m) = 50 kg Mass of the satellite (M) = 250 kg Applied force…

Q: A 2500 kilogram truck is moving initially with a velocity of 10.00 meters per second. To change its…

A:

Q: A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.0 s, assuming…

A: u = 19.6 m/s2 Final velocity = v t = 3 sec  a = -g(-9.8 m/s2)

Q: Question 7 A car is coasting to the right but slowing down. ос F A G D E B Question 8 A ball is…

A: A free-body diagram is used to represent the magnitude and direction of forces acting on an object…

Q: A constant net force of 700.0 N moves a 1,000.0-kg car 100.0 m. If the car was initially at rest,…

A: Given data: Net applied (F) = 700 N Mass (m) = 1000 kg Distance (d) = 100 m Need to determine the…

Q: As part of a physics experiment, you stand on a bathroom scale in an elevator. even though you…

A: Given Actual weight W = 704 N Apparent weight W' = 894 N Acceleration a = 2.65 m/s2 , upward

Q: A parachutist jumps out of an airplane and accelerates with gravity to a maximum velocity of 58.8…

A:

Q: You know your weight is 680 N, but when you stand on a scale in an elevator it tells you that your…

A: Given:- Actual weight = 680 N Weight in elevator = 600 N The weight measured is less than your…

Q: For every action, there is an equal and opposite reaction, is Newton's: A) First law B) Second law…

A: According to zeroth law of Newtons First law: A body at stationery remains at stationery, a body in…

Q: The force that propels a rocket is provided by   (A) Gravity (B) Newton’s laws of motion (C) Its…

A: According to Newton's second law of motion ,net force acting on an object is given as,  F= m a  Here…

Q: When a force of 10N is applied to a body its acceleration is 2m/sz. The mass of the body is 5kg aO…

A: Answer:-    (a) 5 kg Given  Force (F) = 10 N  Acceleration of a body(a) = 2 m/s2  Mass of a body (…

Q: A 50 kN truck travelling with a speed of 50 kph hits a lamp post and is brought to rest in 0.1…

A: The expression for the average force is, Favg=m∆v∆t

Q: In the figure below, what is the force exerted by the track on the roller-coaster car at the top of…

A: Given Information:- Total mass of the roller-coaster with the passengers is M=500 kg Radius of the…

Q: A 140-gram apple fell from a tree and hit Sir Isaac's head. What is the force exerted by Sir Isaac's…

A: Given data: A apple fell from tree  Mass (m) = 140 g = 0.140 kg Required: The force exerted on the…

Q: A boat with mass of 5.8 * 10° kg is traveling at 9.1 * 10' m/s. What is the magnitude of the force…

A: Given data:  Mass (m) = 5.8×103 kg Initial velocity (v0) = 9.1×101 m/s Final velocity (v) = 0 m/s…

Q: What is the tension in the cable that is lifting a 3500 kg elevator if the upward acceleration of…

A: Since the elevator is accelerating upward, the net force is given by F=T-mgma=T-mgT=ma+g Substitute…

Q: A not so muscular student throws a golf-ball only 60 meters high and it then falls the same distance…

A: Maximum height attained = 60 m  Acceleration due to gravity = 9.8 m /s2

Q: As part of an exercise program, a woman walks south at a speed of 2.8 m/s for 46 minutes. She then…

A:

Q: A box with mass 25.1 kg has an initial velocity of 2.66 m/s when a woman starts pushing the box with…

A: Given data: Mass of box is, m=25.1 kg. Initial velocity of box is, u=2.66 m/s. Net force acting on…

Q: An aircraft catapult launches an F-22 from 0 to 180 mph in a distance 150 m. How many g’s did the…

A: Intital Speed u = 0 m/s Final Speed v = 180 mph = (180 *0.447) = 80.6672 m/s distance (s) = 150 m…

Q: Your mass is 94.2 kg, and the sled s mass is 16.1 kg. The sled is moving by itself on the ice at…

A:

Q: If it takes a human cannonball 1.8 s to exit a 1.9 m long cannon and the average net force acting on…

A: Given, Length of the cannon, L = 1.9 m time taken by cannonball to exit, t = 1.8 s Net force acting…

Q: cat chasing a mouse slides off a deck. The cat lands 1.8 m from the deck. The deck was 2.2 m high.…

A:

Q: The froghopper holds the title of the best jumper of the animal world. A 0.0198-gram (1.98 X 10-5…

A: Mass of the froghopper, m = 1.98 x 10-5 kg Initial speed of grasshopper, Vo = o m/s Final speed of…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.