Home
Class 11
PHYSICS
A variable force, given by the 2 -dimens...

A variable force, given by the 2 -dimensional vector `vec F-(3x^(2)hat i+4hat j)`, acts on a particle. The force is in newtons and `x` is in metre. What is the change in the kinetic energy of the particle as it moves from the point with coordinates `(2,3)` to `(3,0)` ?(The coordinates are in metres )
a) `-7J`
b)`zero`
c )+7J
d) `+19J`

Promotional Banner

Similar Questions

Explore conceptually related problems

A varable force, given by the 2- dimensional vector overlineF=(3xx^(2)hati+4 hatj), acts on a particle. The force is in newton and x is in metre. What is the change in the kinetic energy of the particle as it moves from the point with coordinates (2,3) to (3,0) (The coornates are in metres)

The force 7 hat i+ 3 hat j - 5 hat k acts on a particle whose position vector is hat i- hat j + hat k . What is the torque of a given force about the origin ?

A force (hat(i)-2hat(j)+3hat(k)) acts on a particle of position vector (3hat(i)+2hat(j)+hat(k)) . Calculate the torque acting on the particle.

A force bar F = (3hat i-4 hat j +b hat k)N is acting on the particle which is moving from point A ( 0-1, 1) m to the point B(2, 2 3) m If net work done by the force on the particle is zero then value of b is

A Force F acting on an object varies with distance x as shown in the figure . The force is in newton and x in metre. The work done by the force in moving the object from x = 0 to x = 6m is (a) 4.5 J (b) 13.5 J (c) 9.0 J (d) 18.0 J

A force vec(F)=2hat(i)-3hat(j)+7hat(k) (N) acts on a particle which undergoes a displacement vec(r )=7hat(j)+3hat(j)-2hat(k)(m) . Calculate the work done by the force.

A charged particle moves with velocity vec v = a hat i + d hat j in a magnetic field vec B = A hat i + D hat j. The force acting on the particle has magnitude F. Then,

A charged particle moves with velocity vec v = a hat i + d hat j in a magnetic field vec B = A hat i + D hat j. The force acting on the particle has magnitude F. Then,

Calculate the magnitude of the vector, overset(rarr)r =(3 hat i+4 hat j + 7hat k) metre.

An object is acted upon by the forces vec(F)_(1)=4hat(i)N and vec(F)_(2)=(hat(i)-hat(j))N . If the displacement of the object is D=(hat(i)+6hat(j)-hat(k)) m, the kinetic energy of the object