Repost physics
posted by Han .
Suppose the position of an object is given by >r(vector) = (3.0t^2*ihat  6.0t^3*jhat)m. Where t in seconds.
Determine its velocity >v as a function of time t.
Determine its acceleration >a as a function of time t.
Determine >r at time t = 2.5 s.
Determine >v at time t = 2.5s.
I don't really understand the vector units and the answers require the i^ and j^ vector units. Please explain the significance, my prof didn't do justice in class.
Respond to this Question
Similar Questions

Physicscalc
Suppose the position of an object is given by >r(vector) = (3.0t^2*ihat  6.0t^3*jhat)m. Where t in seconds. Determine its velocity >v as a function of time t. Determine its acceleration >a as a function of time t. Determine … 
physics
At t= 0, a particle starts from rest at x= 0, y= 0, and moves in the xy plane with an acceleration >a (vector) = (4.0ihat+ 3.0jhat)m/s^2. Assume t is in seconds. Determine the x component of velocity as a function of time t. Determine … 
Physics urgent help needed!
Suppose the position of an object is given by >r(vector) = (3.0t^2*ihat  6.0t^3*jhat)m. Where t in seconds. Determine its velocity >v as a function of time t. Determine its acceleration >a as a function of time t. Determine … 
phys
At t= 0, a particle starts from rest at x= 0, y= 0, and moves in the xy plane with an acceleration >a = (4.0ihat+ 3.0jhat)m/s^2. Assume t is in seconds. Determine the position of the particle as a function of time t. Express your … 
physics
The acceleration of a particle moving only on a horizontal plane is given by a= 3ti +4tj, where a is in meters per secondsquared and t is in seconds. At t = 0s, the position vector r= (20.0 m)i + (40.0 m)j locates the particle, which … 
physics
The acceleration of a particle moving only on a horizontal plane is given by a= 3ti +4tj, where a is in meters per secondsquared and t is in seconds. At t = 0s, the position vector r= (20.0 m)i + (40.0 m)j locates the particle, which … 
physics
At a certain instant, a particlelike object is acted on by a force F = (4.0 N) ihat  (3.0 N) jhat + (9.0 N) khat while the object's velocity is v =  (2.0 m/s) ihat + (4.0 m/s) khat. What is the instantaneous rate at which the force … 
physics
At the instant the displacement of a 2.00 kg object relative to the origin is d = (2.00 m) ihat + (4.00 m) jhat  (3.00 m) khat, its velocity is v =  (6.20 m/s) ihat + (2.70 m/s) jhat + (2.60 m/s) khat, and it is subject to a force … 
physics
A particle moves through an xyz coordinate system while a force acts on it. When the particle has the position vector vector r = (2.00 m)ihat  (3.00 m)jhat + (2.00 m)khat, the force is vector F = Fxihat + (7.00 N)jhat  (5.30 N)khat … 
physics
A particle moves through an xyz coordinate system while a force acts on it. When the particle has the position vector vector r = (2.00 m)ihat  (3.00 m)jhat + (2.00 m)khat, the force is vector F = Fxihat + (7.00 N)jhat  (5.30 N)khat …