The mass m1 is free to rotate on a frictionless table. Mass m1 rotates at a constant speed in a circle of radius r and is connected by a string through a hole in the table to a hanging mass m2 . Mass m2 is at rest. a. Draw and label a free-body diagram for the each of the two masses. You should have two separate free-body diagrams and clearly distinguish to which mass each applies. b. Using variables, write Newton’s 2nd law in the x- and y- direction for mass m1.

Which of the following is true? a. Earth exerts a force due to gravity on your body, and your body exerts a smaller force on the Earth, because your mass is smaller than the mass of the Earth.  b. The Moon orbits the Earth because the Earth exerts a force on the Moon and the Moon exerts a force equal in magnitude and direction on the Earth.  c. A rocket taking off exerts a force on the Earth equal to the force the Earth exerts on the rocket.  d. An airplane cruising at a constant speed is not affected by gravity.

A person exerts a force of 120 NN on a rope that pulls a sled across a very smooth horizontal surface. The rope is oriented 37⁰0 above the horizontal. The sled has a total mass of 50 kgkg. The sled starts at rest and moves for 10 mm. Select all the quantities that can be determined using the given information. A. Determine the acceleration of the sled. B. Determine the normal force exerted by the surface on the sled. C. Determine the time taken for the sled to move 10 m. D. Determine the speed of the sled after moving for 10 m. F. Check all that apply. acceleration of the sled normal force exerted by the surface on the sled mass of the person time taken for the sled to move 10 mm speed of the sled after moving 10 mm

Choose the correct answer ( A / B / equal / can’t tell ).a) A book rests on a table with friction. We apply a force to the book. Which is larger?A – The force required to start moving the bookB – The force required to move the book at a constant speedb) Two blocks are on a table. Block A has double the mass of block B. Is the center of mass of the systemcloser to block A or block B?c) Two blocks slide a distance d on a surface without friction, starting from rest. Both blocks have thesame applied force F, acting parallel to the motion. Block A has twice the mass of block B. Which blockhas more Kinetic Energy when it has traveled the distance d?d) Two blocks slide a distance d on a surface without friction, starting from rest. Both blocks have thesame applied force F, acting parallel to the motion. Block A has twice the mass of block B. In whichcase did the applied force F do the most work?e) The earth orbits around the sun. Which force has a larger magnitude?A – force of the sun on the…

A 10 N force is applied to a 4.0 kg block at rest on a table. The block experiences a frictional force. Draw a free-body diagram of the block.  What is the weight of the block?  What is the normal force on the block?  If the coefficient of kinetic friction is µk = 0.20, what is the kinetic frictional force on the block?  What is the net force on the block?  What is the acceleration of the block from the net force?  Just 1, 2, and 3 please!

A string, 0.750 m in length, is attached to a hook in the ceiling. A 0.600 kg mass is rotating around the vertical axis and the angle between the vertical axis and the string is 18°. a) Draw the free body diagram and kinetic diagram of the mass. b) Determine the tension in the string. c) Determine the velocity of the mass

3. Consider an inclined plane with two balls suspended as shown below. The pulley has negligible mass and both the pulley and the surface of the incline are frictionless.a. If one of your classmates calculated that, once released, the acceleration of the blocks would be 43?, without doing any calculations, say whether or not this could be a reasonable value for the acceleration.b. Draw and label a free body diagram (FBD) for each ball. (Don’t break any forces into components for the FBDs—save that work for the next question. Be sure your drawings show clearly any information you know about the directions and relative magnitudes of the forces.) Rank the relative magnitudes of all forces in your FBDs. (I’m looking for a single ranking that includes every different force in both FBDs, separated by <, >, or =.)Ball A: Ball B:relative sizes of the magnitudes of all forces in FBDs:__________________________________________________________________c. Use the FBDs from the previous…

3. a. Explain, with a free body diagram, how an object can experience a zero net force when at least three forces are acting on it.

3.2.2 Represent and reason Two blocks are connected with a light string that runs over two light pulleys.

Researchers often use force plates to measure the forces that people exert against the floor during movement. A force plate works like a bathroom scale, but it keeps a record of how the reading changes with time. Shown is the data from a force plate as a woman jumps straight up and then lands.a. What was the vertical component of her acceleration during push-off?b. What was the vertical component of her acceleration while in the air?c. What was the vertical component of her acceleration during the landing?d. What was her speed as her feet left the force plate?e. How high did she jump?