Physics
A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Given the magnitude and direction of the acceleration of the body.
27
Nov
A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Given the magnitude and direction of the acceleration of the body. A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Given the magnitude and direction of the acceleration [...]
A constant force acting on a body of mass 3.0 kg changes its speed from 2.0m s^−1 to 3.5m s^ −1 in 25s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force?
27
Nov
A constant force acting on a body of mass 3.0 kg changes its speed from 2.0m s^−1 to 3.5m s^ −1 in 25s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force? (a) during its upward motion (b) during its downward motion (c) at the [...]
Tags:
(a) during its upward motion ,
(b) during its downward motion ,
(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance. ,
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble ,
A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. How long does the body take to stop ?
27
Nov
A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. How long does the body take to stop ? A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. [...]
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble, (a) during its upward motion, (b) during its downward motion, (c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance.
27
Nov
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble, (a) during its upward motion, (b) during its downward motion, (c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle [...]
Tags:
(a) during its upward motion ,
(b) during its downward motion ,
(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance. ,
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble ,
The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with a speed of 40ms^−1 can go without hitting the ceiling of the hall?
27
Nov
The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with a speed of 40ms^−1 can go without hitting the ceiling of the hall? The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with [...]
i and j are unit vectors along x- and y-axis respectively. What is the magnitude and direction of the vectors i + j and i− j ? What are the components of a vector A = 2i and 3j along the directions of i + j and i – j ? [You may use graphical method]
27
Nov
i and j are unit vectors along x- and y-axis respectively. What is the magnitude and direction of the vectors i + j and i− j ? What are the components of a vector A = 2i and 3j along the directions of i + j and i – j ? [You may use graphical [...]
An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft positions 10 s apart is 30^o , what is the speed of the aircraft ?
27
Nov
An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft positions 10 s apart is 30^o , what is the speed of the aircraft ? An aircraft is flying at a height of 3400 m above the ground. If the [...]
A fighter plane flying horizontally at an altitude of 1.5 km with speed 720 km/h passes directly overhead an anti-aircraft gun. At what angle from the vertical should the gun be fired for the shell with muzzle speed 600 ms^−1 to hit the plane ? At what minimum altitude should the pilot fly the plane to avoid being hit ? (Take g=10 ms^−2 )
27
Nov
A fighter plane flying horizontally at an altitude of 1.5 km with speed 720 km/h passes directly overhead an anti-aircraft gun. At what angle from the vertical should the gun be fired for the shell with muzzle speed 600 ms^−1 to hit the plane ? At what minimum altitude should the pilot fly the plane [...]
A cyclist is riding with a speed of 27 km/h. As he approaches a circular turn on the road of radius 80 m, he applies brakes and reduces his speed at the constant rate of 0.5 m/s every second. What is the magnitude and direction of the net acceleration of the cyclist on the circular turn ?
27
Nov
A cyclist is riding with a speed of 27 km/h. As he approaches a circular turn on the road of radius 80 m, he applies brakes and reduces his speed at the constant rate of 0.5 m/s every second. What is the magnitude and direction of the net acceleration of the cyclist on the circular [...]
Rain is falling vertically with a speed of 30ms^−1 . A woman rides a bicycle with a speed of 10ms^−1 in the north to south direction. What is the direction in which she should hold her umbrella ?
27
Nov
Rain is falling vertically with a speed of 30ms^−1 . A woman rides a bicycle with a speed of 10ms^−1 in the north to south direction. What is the direction in which she should hold her umbrella ? Rain is falling vertically with a speed of 30ms^−1 . A woman rides a bicycle with a [...]