A friend says that, since Earth’s gravity is so much stronger than the Moon’s gravity, rocks on the Moon could be dropped to Earth. What is wrong with this assumption?

Q: You will need to use the Momentum Principle to do the first part of this problem, and the Energy…

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Q: -25 At t = 0 a 1.0 kg ball is thrown from a tall tower with v= (18 m/s)i + (24 m/s)j. What is AU of…

A: From the given velocity vector, the vertical initial speed of the ball is,

Q: A pail of water can be whirled in a vertical path such that none is spilled. Why does the water…

A: Centrifugal force is the inertial force acting on the particle performed circular motion, Which acts…

Q: Two balls (A and B) of masses (K, 2 kg) fell in order at the same time together, ball (A) fell from…

A: Mass of A = k Mass of B = 2 kg Height of A above the ground = 8 m

Q: A student wrote: “The only reason an apple falls downward to meet the earth instead of the earth…

A: Apple and earth

Q: A machine gun fires 100 bullets in 5 seconds with a speed of 400 m/s. The mass of each bullet is 2.0…

A: Given: No.of bullets fired in 5 s, n = 100 Speed of each bullet, v = 500 m/s Mass of each bullet, m…

Q: Flying Circus of Physics On August 10, 1972, a large meteorite skipped across the atmosphere above…

A:

Q: you throw a 1.5 kg stone straight up into the air initially at rest your hand exerts a force of 151N…

A: From newton’s second law of motion.

Q: Both balls have a(n) of zero. However, the lead-filled ball has a mass than the hollow ball. Suppose…

A: Here, it is given that an astronaut is orbiting the earth.  She has two balls, one is hollow and the…

Q: A loaded gun is dropped on a frozen lake. The gun fires, with the bullet going horizontally in one…

A: Mass of bullet = m= 0.02 kg Speed of bullet = u = 300 m/s Mass of gun = M = 1.2 kg Speed of gun = V…

Q: A 0.50-kg ball that is tied to the end of a 1.5m light cord is revolved in a horizontal plane, with…

A:

Q: A paddle ball is a child’s toy where a ball is attached to a paddle with an elastic string. As the…

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Q: is 9.8 m

A:

Q: A loaded gun is dropped on a frozen lake. The gun fires, with the bullet going horizontally in one…

A: Given that            the mass of the bullet is (m) = 0.04Kg            The speed of the bullet is…

Q: Where do you weigh more—at the bottom of Death Valley or atop one of the peaks of the Sierra Nevada?…

A: Weight of an object is the gravitational force experienced by the object.

Q: For the same force, why does a long cannon impart more speed to a cannonball than a small cannon?

A: The relation between impulse and the momentum is

Q: Newton's Cradle is the physics toy with several balls hanging from string in contact with one…

A:

Q: A rocket is fired in a gravity-free environment in deep space. The rocket has an initial mass of…

A: Given: Initial mass, m=9000 kg Velocity, v=2375 m/s Acceleration, a=49.50 m/s2 Time, t=2 s

Q: Which statement is incorrect?  The gravitational force on an orbiting satellite due to the Earth aim…

A: Given that a satellite is orbiting around earth. Concept : Force on gravity on ms due to Me is given…

Q: A rocket powered toy car is released from rest at the edge of a table whose surface is 3.0 m above…

A: Given: ux=0 m/suy=0 m/s    (since, car released from rest)H=3.0mm=1.0kgF=3.0N (horizontal)

Q: why is gravity not negative? (-9.8 m/s^2)   and the free fall accerlation (-25.9 m/s)?

A: Given information: It is mentioned why the acceleration due to gravity is not negative in the given…

Q: An iron sphere of mass 30 kg has the same diameter as an aluminum sphere of mass 10.5 kg. The…

A: Given :-mass of iron sphere (MF)=30 kgmass of iron sphere (MAl)=10.5 kg

Q: Which is easier to get swinging, a baseball held at the end or one held closer to the massive end?

A: The situation in which the baseball bat can be swung with more ease depends on the centre of gravity…

Q: An astronaut is a short distance away from her space stationwithout a tether rope. She has a large…

A: Given An astronaut is a short distance away from her space stationwithout a tether rope. She has a…

Q: A car is moving at 50.0km/hr. it’s mass is 1500kg. if it is to reduce its speed by 50% over 100.0m…

A: Given data The initial speed is u=50 km/h=13.89 m/s The speed is reduced by n=0.50 The distance…

Q: You and another astronaut are in space.  You throw a tool to them that has a mass of 15kg.  Your…

A: Mass of tool, mt = 15 kg Your mass, my = 91 kg Other astronaut's mass, ma = 88 kg Speed of tool, vt…

Q: She lies on a plank on two scales: one at her head, the other at her feet.  They are 1.71 meters…

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Q: A boy and a girl are just standing on a frozen lakeThe girl pushes the boy. The boy speed of 4.64…

A:

Q: The mass of an object is a measure of its __________. a. inertia b. energy c. force d. gravity

A: The mass of object is a measure of its inertia.

Q: One student argues that a satellite in orbit is in free fall because the satellite keeps falling…

A: Satellites are those bodies that orbit around a planet or a star in a particular orbit with a…

Q: You are on a spacewalk with another astronaut. You throw a tool to them. Your mass is 82 kg, the…

A:

Q: You and another astronaut are in space. You throw a tool to them that has a mass of 17kg. Your…

A: Velocity of tool with respect to first astronaut at the point of release of tool = 7m Let after…

Q: A 90 kg person is sitting in a 100 kg boat, which is floating at rest on a lake. In the boat is a…

A: mass of person= 90Kg mass of boat= 100 Kg  stone with a mass of 5.0 kg Velocity of stone = 4m/s…

Q: An engineer at NASA is investigating the impact of meteorites on planets.  He performs  experiments…

A: Introduction:Here, medium vacuum so the external resistive force is zero, and energy of the system…

Q: An astronaut on the Moon takes a break from work to do some golfing. He attempts a long drive to the…

A: (A) Write the expression of the maximum height of the projectile. h=vi2sin2θ2g

Q: Two objects, A and B, are released from rest in free space (no other masses are near). Object A has…

A: The force exerted by object A on B. FAB=GmAmBrAB2 The force exerted by object B on A. FBA=GmBmArBA2…

Q: A rocket expels 1.2 x 10^3 kg of gas each second at a speed of 5.0 x 10^4 m/s. Will the thrust…

A: Gravitational force or weight of the rocket W= 5.8 x 107 N Mass flow rate of the gas m=1.2 x 103…

Q: Two objects with different masses have the same momentum. The less massive object will have a…

A: solution is given as

Q: Two objects, A and B, have the same size and shape. Object A is twice as massive as B. The objects…

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Q: A pig of mass 500kg stands in an elevator. The normal force exerted on the pig by the elevator floor…

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Q: Was it easier to push a fist into the bag with no water or into the bag with water?

A: Answer We can move easily through air than through water. If the road is full of water we can't…

Q: You are diving board over a swimming pool. You are throwing upward a tennis ball at a speed 3 m/s.…

A: Let height is h between board and water  Now by  V2 = U2 + 2ah  152 = 32 + 2(-9.8)h  h =…

Q: Two children float motionless in a space station. The 20 kg girl pushes the 40 kg boy and the boy…

A:

Q: erson pick a compression spring ping pong ball launcher ove

A: Given:- A person using pick a compression spring ping pong ball launcher, he is not taking any…

Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!