Un bloque de hielo con masa de 4.00 kg está ini-
cialmente en reposo sobre una superficie horizontal sin fricción. Un

obrero le aplica entonces una fuerza horizontal F y el bloque se mueve sobre el eje x, de modo que su posición en función del tiempo está dada por x(t) = at + bt , donde a = 0.200 ms , b = 0.0200 ms . a) Calcule la velocidad del objeto en t = 4.00 s. b) Calcule la magnitud
de F en t = 4.00 s. c) Calcule el trabajo efectuado por la fuerza F durante los primeros 4.00 s del movimiento.

3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0

How do the forces acting on a boat compare to the force acting on a plane ?

What is the acceleration rate of an object if the amount of force applied on the object is 75 newtons and the object has a mass of 15 kilogram?