Balance and Force

How would you describe the vertical direction forces in this free body diagram?

What is the horizontal net force acting on this object?

What is the net force in the vertical direction?

What is the acceleration of this object if it has a mass of 10 kg?

A box has three forces applied to it in the horizontal direction: a 50 N force to the right, a 30 N force to the left & a 20 N force to the right. What is the net force on the box?

The free body diagram of four boxes are shown below. Which box is in equilibrium?

Two blocks of wood, each of mass 2 kg, are suspended from the ceiling by strings of negligible mass, as shown above.What is the tension in the upper string?

Two blocks of wood, each of mass 2 kg, are suspended from the ceiling by strings of negligible mass, as shown above.What is the force exerted on the upper block by the lower string?

A block of mass 2 kg is suspended from a rope, as shown above. If the tension in the rope is 10 N, the acceleration of the block is most nearly

Two blocks of masses m and M are suspended as shown above by strings of negligible mass. If a person holding the upper string lowers the blocks so that they have a constant downward acceleration, the tension in the string at point P is

A 50-kg student stands on a scale in an elevator. At the instant the elevator has a downward acceleration of 1.0 m/s² and an upward velocity of 3.0 m/s, the scale reads approximately

A rope of negligible mass supports a block that weighs 30 N, as shown above. The breaking strength of the rope is 50 N. The largest acceleration that can be given to the block by pulling up on it with the rope without breaking the rope is most nearly

A mass is suspended from the roof of an elevator by means of a spring balance. The elevator is moving upwards and the readings of the spring balance are noted as follows:

Speeding up: R_U

Constant speed: R_C

Slowing down: R_D

Which of the following is a correct relationship between the readings?

Two blocks are connected by a rope, as shown above. The masses of the blocks are 5 kg for the upper block and 10 kg for the lower block. An upward applied force of magnitude F acts on the upper block.

Question

The system is moving and accelerating upward. A pair of scissors cuts the rope. Which of the following describes the motion of the 10 kg block immediately after the rope has been cut?

Two blocks are connected by a rope, as shown above. The masses of the blocks are 5 kg for the upper block and 10 kg for the lower block. An upward applied force of magnitude F acts on the upper block.

Question

If the net acceleration is downward but has a magnitude less than g, then which has the larger magnitude, the force F or the tension in the rope?

Two blocks are connected by a rope, as shown above. The masses of the blocks are 5 kg for the upper block and 10 kg for the lower block. An upward applied force of magnitude F acts on the upper block.

Question

If the F = 180 N, what is the tension in the rope?