اختبار على درس circular motion

The maximum frictional force between the tyres of a car and the road is 0.5 the weight of the car. If the car negotiates a curve of radius 10 meter, so its velocity is ……….

two balls of masses 8 kg and 20 kg , the distance between their centers is 0.2 m , if the universal gravitational constant is G, so the attraction force between them in newton = …………..

Which of the following affect the strength of the gravitational field on the surface of a planet?…..(more than one answer is correct)

the ratio between the universal gravitational constant on the earth’s surface to that on the moon’s surface is……..unity

If the radius of a circular orbit is increased to four times its original value, the centripetal force required to make the speed of the body constant would be…….

If the tangential linear veloctiy is doubled and the radius of circular path is also doubled. So, the centripetal acceleration……

A racing car can accelerate by changing…….

Two satellites A and B rotate around the earth. If the orbit radius of satellite A equals 4 times the orbit radius of satellite B. So , the ratio between the velocity of satellite A to that of satellite B equals……..

The orbital velocity of a satellite is inversely proportional to……..

An object has a mass of 50 kg and a weight of 500 N when it is resting on the surface of the Earth . If it is moved to a height equal to three times the Earth’s radius , what is the object’s new weight?………

two bodies of mass (m1) and (m2) and the distance between them is (r). if the mass of the first body is doubled and the distance between them is also doubled, the force of attraction between them……..

The orbital velocity that is required to keep the satellite rotating around the earth depends on the ……..

two masses , m1 and m2 are separated by a distance d. what changes in the variables will result in no change in the gravitational force between the masses ?…………(more than one answer is correct)

If the momentum of an object is doubled and its mass decreased to half, its velocity……….

If an object of mass 6 kg moves in a circle of circumference 6 π with constant speed 10m/s, so the centripetal force that acts on the body is ………

two satellites of equal masses orbit a planet . satellite B orbits at twice the orbital radius of satellite A. which of the following statements is true ?………

In the display window of a toy store at the local mall, a battery-powered plane is suspended from a string and flying in a horizontal circle . The 631 gram plane makes a complete circle every 2.15 seconds. The radius of the circle is 0.95 m. Determine the centripetal force acting upon the plane?…….

When a force acts on a moving body in an opposite direction to its motion, its velocity………

In one of the amusement park games, the chairs rotates in a uniform circular path. If one of the chairs is 1.5 m away from the center and another chair is 2 m away from the center and both of them are on the same straight line away from the center, so which of them has the largest tangential velocity ?……….

the planet jupiter orbits the sun at a nearly constant speed . which of the following statements are true?……………..(select the two best answers)

if the distance between the centers of two bodies is doubled and their masses are kept unchanged, the attraction force between them will be………..

Two objects A and B move along the circumference of the same circle with the same velocity where mA = 2 mB so , the acceleration with which A moves is ……… that with which B moves.

The centripetal force acting on a car that moves in a circular path that inclines at an angle with the horizontal is resulted from……..

If the tangential velocity with which a body moves in a circular path is 7 m/s where it makes 4 revolutions in two minutes so, the radius of the circular path equals……..

A stone of mass 4 kg that is tied to a string of length 10 m rotates in a horizontal circle, if the tension force in the string is 160 N. So the stone speed is ……..

On the scale of a building, gravitational field is………..

if the distance between the centers of two masses decreased to its half, the force of attraction between them………..

A body is revolving with a constant speed in a circle . If its direction of motion is reversed but the speed remains the same , then which of the following statements is true ?………

If an aircraft executes a horizontal loop of radius 1 km with a steady speed of 900 km/h, so the ratio of its centripetal acceleration to the acceleration due to gravity is…….

The ratio between the acting force on the body and the rate of change of its velocity according to newton’s second law is the…………

A man of mass 50 kg rides a bicycle on a curved road of radius 30 m with a speed of 2 m/s. If the centripetal force that acts on both the man and the bicycle is 10 N , so the mass of the bicycle is ……..

The product of the mass of a body and the rate of change of its displacement is called……….

An object of mass 0.5 kg at test, started to fall from a height of 180 cm from the surface of earth . Its momentum when it reaches the earth’s surface is ………….

At a place , value of (g) is less by 1 % than its value on the surface of the earth (radius of earth (R) = 6400 km) . The place is ……..

When a body falls freely towards the ground its………

The acceleration due to earth’s gravity is………