1、F.4 PHYSICS EXERCISE Date:Force and Acceleration 11. A block of mass 3 kg resting on a smooth horizontal table is acted on by 2 forces P = 100 N and Q = 40 Nas shown in the figure below.(a) Draw a free-body diagram to show all forces acting on the block.(b) Find the resultant force (both magnitude a
2、nd direction) acting on the block.(c) Apply Newtons second law, find the acceleration (both magnitude and direction) of the block.2. Two blocks A and B, resting on a smooth horizontal surface are connected by a light inextensible string X. Their respective masses of A and B are 0.2 kg and 0.3 kg. Th
3、ey are pulled along the surface with a uniform acceleration of 2 m s-2 by a second string Y as shown.(a) Find the resultant force acting on block A. (b) Find the tension on the string X.(c)Find the resultant force acting on block B.(d) Draw a free-body diagram showing all forces acting on block B.(e
4、) Find the tension in string Y.3. A force of 100 N is applied horizontally against a block A of mass 60 kg, which in turn pushes a block B of mass 40 kg. The floor is smooth.(a) Find the common acceleration.(b) Find the resultant force acting on block A.(c) Find the resultant force acting on block B
5、.(d) Draw a free-body diagram showing all forces acting on block A.(e) Draw a free-boy diagram showing all forces acting on block B.(f) Find the force of contact between the blocks.4. Two blocks of masses 2 kg and 3 kg are placed on a level rough surface and are connected by a string X as shown. A h
6、orizontal force F is applied to the system. If the friction acting on the 2 kg mass and 3 kg mass are 4 N and 6 N respectively. The system moves with common acceleration of 2 m s-2.(a) Find the resultant force acting on the 2 kg mass.(b) Find the resultant force acting on the 3 kg mass(c)Draw a free-body diagram showing all forces acting on the 2 kg mass.(d) Draw a free-body diagram showing ll forces acting on the 3kg mass.(e) Find the value of force F.(f) Find the tension on the string.
