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How much force does an 82.0 kg astronaut exert on his chair while sitting at rest on the launch pad

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Physics
A hammer of mass m falls from rest off of a roof and drops a height H onto your head. a) Assuming that the tool is in actual contact with your head for a time △t before it stops and slides off, what is the algebraic expression for the average force it exerts on your skull ...

vacunero sto. domingo
a 50 kg wagon is at rest on a rough surface.The coefficient of sliding friction is 0.85.How much force is needed to start moving the wagon.

Physics
A dynamics cart with a friction pad is placed at the top of an inclined track and released from rest. The cart accelerates down the incline at a rate of .60m/s^2. If the track is angled at 10 degrees above the horizontal, determine the coefficient of kinetic friction between ...

posibility
One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It has been determined ...

math
One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It has been determined ...

physics
A dynamite blast at a quarry launches a chunk of rock straight upward, and 2.3 s later it is rising at a speed of 18 m/s. Assuming air resistance has no effect on the rock, calculate its speed at (a) at launch and (b) 5.4 s after the launch.

physics
A person holds a 1.56 baseball in his hand, a distance of 34.0 cm from the elbow joint, as shown in the figure(Figure 1) . The biceps, attached at a distance of 2.75 cm from the elbow, exerts an upward force on the forearm. Consider the forearm and hand to be a uniform rod ...

Physics
1.A 4.5kg object is at rest on a table with state friction of 0.56 and kinetic friction of 0.46. A force is applied such that the object just beings to move. If that same force is maintained, at what rate will the object accelerate? The answer is 0.98m/^2 2.A 2.0kg block is at...

NIC
A model rocket is launched straight up from ground level with a speed of 34.2 m/s. Assuming that the only force acting on the rocket after launch is the force of gravity, a. How fast is the rocket going when it reaches a height of 22.5 m? (3 marks) b. How long does it take the...

Physics
The pistons of a hydraulic press have radii of 2.00cm and 12.00cm, respectively. A) What force must be applied to the smaller piston to exert a force of 5250N on the larger piston? B) What is the pressure in (N/cm2) on each piston? C) What is the mechanical advantage of the ...

Algebra
A chair lift is to be built from the bottom of the mountain (point B) to the top (point T). A surveyor found the following measurements: ∠CBT = 21°, ∠BET = 17° and the distance BE = 780. What is the span of the chair lift? (The distance from B to T?) Round your ...

Physics
A solar sail is used to propel a spacecraft. It uses the pressure (force per unit area) of sunlight instead of wind. Assume the sail and its spacecraft have a mass of 245 kg. If the sail has an area of 62,500 m2 and achieves a velocity of 8.93 m/s in 12.0 hours starting from ...

Physics
An exceptional standing jump would raise a person 0.90 m off the ground. To do this, what force must a person of mass 66 kg exert against the ground? Assume the person crouches a distance of 0.20 m prior to jumping, and thus the upward force has this distance to act before he ...

Physics
A shopper exerts a force on a cart of 64N at an angle of 30° below the horizontal. a.) How much force pushes the cart in a forward direction? b.) How much force pushes the cart against the floor?

physics
A 50.0-kg box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. You observe that at one instant the box is sliding to the right at 1.5 m/s and that it stops in 2.5 s with uniform acceleration. What magnitude force does friction ...

Physics
The centers of a 15 kg lead ball and a 140 g lead ball are separated by 8.0 cm. What gravitational force does each exert on the other? Answer: 2.2×10^−8 N Now: What is the ratio of this gravitational force to the weight of the 140 g ball? I don't know how to do this, I'...

physics
What is the magnitude of the electrostatic force that the two protons inside the nucleus of a helium atom exert on each other? Why do atomic nuclei not simply explode?

Physics
two equal charges exert an elecrtric force on each other of 0.0385N when positioned 0.15m apart determine the magnitude of the charge on each point.

Physics
Why can you exert a greater force on the pedals of a bike if you pull up on the handlebars? Does it have anything to do with one of Newton's 3 laws? I'm not sure how to approach this question.

Physics
charges of -6nC and 4nC are 3m apart.(a)Determine the force they exert on each other.(b) the net electric field intensity at a point midway between them.

physics
Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0 V batteries of a 740 kg electric car be able to supply: (a) To accelerate from rest to 25.0 m/s in 1.00 min? (b) To climb a 200 m high hill in 2.00 min at a constant 25.0 ...

physics
Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0 V batteries of a 740 kg electric car be able to supply: (a) To accelerate from rest to 25.0 m/s in 1.00 min? (b) To climb a 200 m high hill in 2.00 min at a constant 25.0 ...

Physics
the speed of the train is reduce uniformly from 15m/s to 7m/s while travelling a distance of 90m. a) compute the acceleration b) how much further will the train travel before coming to rest provided the acceleration remain constant.

physics
whenever two Apollo astronauts were on the surface of the moon, a third astronaut orbited the moon, assume the orbit to be circular and 100 km above the surface of the moon, where the acceleration due to gravity is 1.52 m/s^2. the radius of the moon is 1.70* 10^6 m.(a) ...

physics
whenever two Apollo astronauts were on the surface of the moon, a third astronaut orbited the moon, assume the orbit to be circular and 100 km above the surface of the moon, where the acceleration due to gravity is 1.52 m/s^2. the radius of the moon is 1.70* 10^6 m.(a) ...

Math
Can someone please help me set this up. I didn't quite understand how to do this today. Before leaving Earth, the mass of an astronaut is measured to be 60kg. The astronaut lands on the Moon and measures the acceleration of gravity to be 1.6 m/s2(squared). What would the ...

Physics - pulley
A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.5 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. I have done the problem but am...

physics
A 3800 kg car travels around an unbanked corner at the recommended speed of 65 km/hr. the radius of curvature is 80 m. a) what is the force that the road exerts on the car to keep it in motion around the corner? b) what force would the road need to exert if the car was ...

physics
(a) Two point charges totaling 8.50 µC exert a repulsive force of 0.100 N on one another when separated by 0.839 m. What is the charge on each? smallest charge (µC) largest charge (µC) (b) What is the charge on each if the force is attractive? smallest charge (µC) largest ...

physics
(a) Two point charges totaling 8.50 µC exert a repulsive force of 0.100 N on one another when separated by 0.839 m. What is the charge on each? smallest charge (µC) largest charge (µC) (b) What is the charge on each if the force is attractive? smallest charge (µC) largest ...

physics
Junes Verne in 1865 suggested sending people to the Moon by firing a space capsule from a 255 m long cannon with a launch speed of 11.42 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch?

math
If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider the following ...

physics
If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider the following ...

physics
If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider the following ...

physics
If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider the following ...

physics
If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider the following ...

physics
If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider the following ...

science
If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider the following ...

Physics
To strengthen his arm and chest muscles, an 83.0 kg athlete 2.00 m tall is doing a series of push-ups. His center of mass is 1.15 m from the bottom of his feet, and the centers of his palms are 30.0 cm from the top of his head. Find the force that the floor exerts on each of ...

Physics
to strengthen his arm and chest muscles, an 82-kg athlete who is 2.0 m tall is doing push ups. his center of mass is 1.15 m from the bottom of his feet, and the centers of his palms are 30.0cm from the top of his head. find the force that the floor exerts on each of is feet ...

physical
to strengthen his arm and chest muscles, an 82-kg athlete who is 2.0 m tall is doing push ups. his center of mass is 1.15 m from the bottom of his feet, and the centers of his palms are 30.0cm from the top of his head. find the force that the floor exerts on each of is feet ...

physice
A deep-sea fisherman struggles to bring in a big salmon (see figure below). Find the force each hand must exert on the pole if the tension in the line is 155 N. Neglect the weight of the pole and assume that the force exerted by the left hand is directed along the horizontal...

physics
A car traveling at 62 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 58 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force in newtons (assumed constant) acts on the passenger's upper torso...

Physics
A projectile is fired with an initial speed of 31.0 at an angle of 10.0 above the horizontal. The object hits the ground 7.50 later. a. How much higher or lower is the launch point relative to the point where the projectile hits the ground? b. To what maximum height above the ...

Physics
A projectile is fired with an initial speed of 28.0 m/s at an angle of 65 degrees above the horizontal. The object hits the ground 9.5 seconds later. a) How much higher or lower is the launch point relative to the point where the projectile hits the ground? b) To what maximum ...

PHYSICAL SCIENCE
A 0.50-KG BLOCK INITIANALLY ON A REST ON A FRICTIONLESS HORIZONTAL SURFACE IS ACTED UPON BY A FORCE OF 8.0N FOR A DISTANCE OF 4.0M. HOW MUCH KINETIC ENERGY DOES THE BLOCK GAIN?

physics
a supertanker with a mass of 5.0 x 10 to the 8th power kg accelerates from rest to a speed of 10 m/s in a time of 1000s. what is its average acceleration? how much force is required to accelerate the supertanker?

Physics
car going 15 m/s is brought to a rest in a distance of 2.0 m as it strikes a pile of dirt. how much average force is exerted by the seatbelts on a 90 kg passenger as the car is stopped?

physics
A thin uniform stick having a mass of 0.680 kg and a length of 1.50 m is at rest, hanging vertically from a strong, fixed hinge at the uppermost end of the stick. The stick is free to swing back and forth in an Up-Down-East-West plane. Suddenly, the midpoint of the stick is ...

physics
Suppose that three astronauts outside a spaceship decide to play catch. All the astronauts weigh the same on Earth and are equally strong. The first astronaut throws the second astronaut toward the third one and the game begins. Describe the motion of the astronauts as the ...

physics
A worker applies a torque to a nut with a wrench 0.485 m long. Because of the cramped space, she must exert a force upward at an angle of 57.0° with respect to a line from the nut through the end of the wrench. If the force she exerts has magnitude 81.5 N, what magnitude ...

physics
1. A ball moving horizontally clears a net 2 meters high. What maximum speed can it have if it is to fall within 5 meters of the net? 2.A pulley system lifts a load of 800 Newtons, 20 centimeters while the rope pulling it moves 100 cm. a. How much force must be applied to lift...

Conservation if Linear Momentum
A student (m = 66 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 s. The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From ...

Physics
Find the attracting force between 2 people sitting .08 meters apart. One person has a mass of 62kg and the other 80kg.

sharma
If you watch little kids try to open doors, they will often just push anywhere on the door, rather than on the edge like adults do. This is because they don't understand that it's easier to open a door if you push on the edge. But how much easier? Consider the following ...

Physics
A worker pushes 25Kg crate a distance of 5m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic frication between the crate and the floor is 0.23. (a) What magnitude of force must the worker apply? (b) How much work is done on the...

Physics
Question # 1 Marks = 12 A worker pushes 25Kg crate a distance of 5m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic frication between the crate and the floor is 0.23. (a) What magnitude of force must the worker apply? (b) How ...

physics
1. While strolling along on unknown planet, an astronaut decides to throw a hammer and a feather upwards at 5.0 m/s. They both return to the point of release in 3.0 s. What is the acceleration due to gravity on Planet X. 2. Marii jumps straight upward at 15.0 m/s. How high is ...

Physics
A worker applies a torque to a nut with a wrench 0.430 m long. Because of the cramped space, she must exert a force upward at an angle of 59.5° with respect to a line from the nut through the end of the wrench. If the force she exerts has magnitude 81.0 N, what magnitude ...

Physics
A bridge is 200 m long. A car weighing 2.5 metric tons is 50 m from one end of the bridge and a trucj weighing 6 metric tons is 80 m from the other end. The bridge is uniformly paved and weighs 20 metric tons. How much force does the vertical support at each end exert?

Physics
Two electrostatic point charges of +60.0 uC and +50.c uC exert a repulsive force on each other of 175 N. What is the distance between the two charges? So let's say I use Coulomb's law would the repulsion of 175 N be considered the equivalent of the electric force? Can someone ...

Physics
When Reggie stepped up to the plate and hit a 0.150-kg fast ball traveling at 36.0 m/s, the impact caused the ball to leave his bat with a velocity of 45.0 m/s in the opposite direction. a. If the impact lasted for 0.002 s, what force did Reggie exert on the baseball? b. ...

PHYSICS PLEASE HELP
An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to his back has a mass of 134 kg. During a space-walk, the unit, which has been completely filled with propellant gas, ejects some gas with a velocity of +32 m/s. As a result, the ...

PHYSICS
a MAGNET CAN EXERT A FORCE ON A MOVING CHARGED PARTICLE, BUT IT CAN NOT CHANGE THE PARTICLE'S KINETIC ENERGY. WHY?

Physics
A magnet can exert a force on a moving charged particle, but it cannot change the particle's kinetic energy. Why not?

physics
Assume the driver has a mass of 70.6 kg . What horizontal force does the seat exert on the driver? Answer in units of N

Physics
What force do the blades of a 4200 kg helicopter exert on the air when the helicopter is dropping at 23 m/s with speed decreasing at 3.7 m/s^2?

Science
If you spin a water-filled cup horizontally on a flat table, did you exert force on the water?

science
if the ball that was thrown to a fried has a mass of 0.15kg and it accelerates at 20m/s, what force did you exert on the ball?

Physics
1. A slingshot is used to launch a 5.00-gram rock. The effective spring constant of the slingshot is 200 N/m. By what distance must the slingshot be stretched in order to launch the rock at 20.0 m/s?

Math
Dina earned 1/4 for baby sitting and 1/2 for washing the dishes. How much money did she NOT earn from $25.00?

Physics
. How much potential energy does the 2.5 kg rock sitting on an 18 –meter high cliff have?

physics
A freight train has a mass of 3.2 × 107 kg. If the locomotive can exert a constant pull of 7.1 × 105 N, how long would it take to increase the speed of the train from rest to 74.6 km/h? (Disregard friction.)

physics
A freight train has a mass of 1.5 × 107 kg. If the locomotive can exert a constant pull of 4.9×105 N, how long does it take to increase the speed of the train from rest to 74 km/h? Answer in units of min.

physics
A freight train has a mass of 3.1 × 107 kg. If the locomotive can exert a constant pull of 4.9 × 105 N, how long would it take to increase the speed of the train from rest to 71.9 km/h? Disregard friction.

Physics
A freight train has a mass of 1.7 × 10^7 kg. If the locomotive can exert a constant pull of 5.2 × 10^5 N, how long would it take to increase the speed of the train from rest to 74.6 km/h? Disregard friction. Answer in units of s

Physics
A freight train has mass of 1.6 x 107 kg. If the locomotive can exert a constant pull of 760000 N, how long does it take to increase the speed of the train from rest to 79 km/h? Answer in units of min.

Physics
A girl having mass of 35 KG sits on a trolley of mass 5 KG. The trolley is given an initial velocity of 4 m/s by applying a force. The trolley comes to rest after travelling a distance of 16 m. (i) How much work is done on the trolley? (ii) How much work is done by the girl?

Aths
Suppose you are an astronaut spacewalking outside your spacecraft to repair a broken part. In fixing the part, you have drifted several meters from your spacecraft. You are now at rest and are still holding a bag filled with tools. How could you return to your ship?

Science
what is the difference between mass and weight? The mass of an object is the amount of matter it contains, while its weight is a measurement of the force that gravity exerts on it. The mass of an object is always less than the weight of an object. The mass of an object is ...

Physics
Junes Verne in 1865 suggested sending people to the Moon by firing a space capsule from a 195 m long cannon with a launch speed of 12.78 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch? ____ m/s^2

physics
How much thrust is required to launch a 5 kg bottle rocket with an upward acceleration of 6.4 m/s2? I've gotten 32 because F=MA but I don't understand how to account for gravity. Please help!

Physical Science
A strong magnet attracts a paper cup to itself with a certain force. Does the paper cup exert a force on the strong magnet?

Physics (Normal Force)
When a book weighing 10 N is placed on a table, the table exerts a normal force of 10 N on the book. When a crate weighing 250 N is placed on the same table, the table exerts a normal force of 250 N on the crate. Explain the mechanism that allows the table to exert just the ...

Physics
A steel ball of mass m1 = 1.1 kg and a cord of length of L = 2.3 m of negligible mass make up a simple pendulum that can pivot without friction about the point O, as in the figure below. This pendulum is released from rest in a horizontal position, and when the ball is at its ...

Physics
Two bowling balls each have a mass of 6.8kg. the speres are located nest to one another with their centers 21.8 cm apart. what gravitational force do they exert on each other?

physics
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a horizontal, cylindrical tube 58 ft long and is represented in the figure below. Assume an astronaut in training sits in a seat at one end, facing the axis of rotation 29.0 ft away. Determine ...

physics
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a horizontal, cylindrical tube 58.0 ft long and is represented in the figure below. Assume an astronaut in training sits in a seat at one end, facing the axis of rotation 29.0 ft away. ...

physics
a physics book is on top of a drafting table at 35 degree angle. Find the net external force acting on the book and determing wether the book move or remain at rest on this position. they give you: force of friction 11N, force normal 18N,force of gravity on the book 22N.

PHYSICS
A hummingbird is able to hover because, as the wings move downwards, they exert a downward force on the air. Newton's third law tells us that the air exerts an equal and opposite force (upwards) on the wings. The average of this force must be equal to the weight of the bird ...

physics
A mass pulled by a constant force accelerates from 10 cm/s to 40 cm/s in 5.5 s. A second force accelerates the same mass from rest to 105 cm/s in 15.0 s. If the first force is known to be 5.0 N, that what is the magnitude of the second force?

Physics
Find the acceleration produced by a force of 1650N against a friction force of 500N while pushing on a mass of 6.50kg.

physics
A particle moving in the xy plane under goes displacement s=(2i+3j)m while the constant force is given by F=(5i+2j)N.calculate the work done by the force F.

physics
An astronaut is traveling in a space vehicle moving at 0.520c relative to the Earth. The astronaut measures her pulse rate at 74.0 beats per minute. Signals generated by the astronaut's pulse are radioed to the Earth when the vehicle is moving in a direction perpendicular to ...

statistics
Settlement of two species of mussel larvae was studied. In a wave exposed location, a collector pad yielded 108 larvae of Mytilus trossulus and 72 of M. californianus. In a wave sheltered location, a collector pad yielded 54 larvae of M. trossulus and 16 of M. californianus. ...

statistics
Settlement of two species of mussel larvae was studied. In a wave exposed location, a collector pad yielded 108 larvae of Mytilus trossulus and 72 of M. californianus. In a wave sheltered location, a collector pad yielded 54 larvae of M. trossulus and 16 of M. californianus. ...

math
One solar pad can raise water temp 1 degree in 30 min. a second solar pad takes 45 min to raise water temp 1 degree in 45 min. Both machines working together. How long will it take to raise the temp 1 degree

physics
A 58-kg astronaut inside a 9-m-long space capsule of mass 550 kg is floating weightlessly on one end of the capsule. He kicks off the wall at a velocity of 3.6 m/s toward the other end of the capsule. How long does it take the astronaut to reach the far wall?

Physics
he weight of an astronaut on the moon is 127 N, where the value of 'g' is only 1.7 m/s2. What would the weight of this astronaut be on the Earth (in N)? I don't know if my attempt is rite? 127n/1.5ms^2 74.70N Divide 74.70N with earth value of G. What is the earths value of G?

physics
You exert a force of 325N on the ball and it compresses the spring 44.5cm. ... Charge B (-5.0*10^-6) is at the origin; charge c (+4.0*10^-6) has coordinates (5 ,0),

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