Calculate the total work done (J) by a force given by: F = ( 3i -6j) N to move an object a displacement given by: R = ( 8i +
6k) m
O a
- 12
Rb
18 i-48)
C C
C
24i - 36j
O d.
d
+ 24

If forces acting on an object are unbalanced. true or false

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)