37 Answered Questions for the topic Gravitation

01/01/17

Gravitational Potential energy doubt
Why gravitational potential gradient is negative when a body is taken away from earth? Please resolve my doubt.
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Gravitation Physics

10/24/16

Gravitation topic doubt
The Gravitation potential difference between the surface of planet and a point 20m above is 16 J/kg. Calculae the work done in moving a 4 kg mass by 8m on a slope of 60degree from the horizontal.
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Gravitation

08/26/16

a planet has mass five times of earth and radius three times that of earth .calculate its acceleration due to gravity ,if value of g on earth is 10m/s^2
GRAVITATION  CHAPTER - CLASS 9 
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05/18/16

Force of gravity? Acceleration?
Mars has a mass of 6.4 × 1023 kg. It has a moon named Phobos with a mass of 1.07 × 1016 kg. a. If their centers are 9400 km apart, what is the force of gravity acting on Phobos?b. If the radius of... more
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Gravitation Physics Momentum Period

05/18/16

Period and speed of pendulum?
The period of motion for a pendulum is the amount of time it takes to swing from right to left and back to right again. The period is given by the equation , where T is the period and L is the... more
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Gravitation Physics Momentum Speed

05/18/16

Speed of launcher?
Dwight uses a spring (k = 40 N/m) on a horizontal surface to make a launcher for model cars. The spring is attached to a holder that has a mass of 0.5 kg. If he compresses the spring and releases... more
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Gravitation Physics Velocity Momentum

05/18/16

Spring Constant? Velocity?
Lincoln goes bungee jumping. He has a mass of 102 kg.a. After his jump, Lincoln hangs from the cord motionless, with the cord stretched by 15 m. What is the spring constant of the bungee cord?b. At... more
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Gravitation Physics Velocity Momentum

05/18/16

Velocity of the canoe?
Blake stands in a canoe in the middle of a lake. The canoe is stationary. Blake holds an anchor with mass 15 kg, then throws it west with a speed of 8 m/s. Blake has a mass of 115 kg and the canoe... more
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Gravitation Physics Momentum Collision

05/09/16

What kind of collision is this? What formulas do I use for a and b?
Bill forgets to put his car in park, and it starts rolling forward. When it is moving at a speed of 2 m/s, it collides with Tanya's car, which is moving 3 m/s backward. Bill's car bounces backward... more
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Gravitation Physics Momentum Force

05/09/16

What force is applied to the car?
At a race track, a car of mass 1150 kg crashes into a concrete wall at a speed of 85 m/s.   a. The car crashes into the wall, stopping in 0.1 seconds. What force is applied to the car?   (I'm... more
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Gravitation Physics

06/21/15

physics gravitation(radius of earth ) help. needed please
If the radius of the earth shrinks by 1.5 % (mass remaining the same ) , then the value of acceleration due to gravity changes by ?   1%   2%   3%   4%
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Gravitation Physics

06/21/15

physics help. needed please
If the radius of the earth becomes half of its present value , with its mass remaining the same , the duration of the one day will become ? 1. 6 hour 2. 12 hour 3. 48 hour 4. 96 hour   although... more
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