Identify all the forces acting on the object and draw a free-body diagram of the object. You are driving on the highway, and you come to a steep downhill section. As you roll down the hill, you take your foot off the gas pedal. You can ignore friction, but you can’t ignore air resistance.

5. A 40 kg girl and an 8.4 kg sled are on the frictionless ice of a frozen lake, 15 m apart but connected by a rope of negligible mass. The girl exerts a horizontal 5.2 N force on the rope.What are the acceleration magnitudes of (a) the sled and (b) the girl? (c) How far from the girl's initial position do they meet?

I don't understand this practice problem.

A block of mass M is suspended at rest by two strings attached to walls, as shown in the figure. The left string is horizontal with tension force T2 and and the right string with tension force T, makes an angle e with the horizontal. g is the magnitude of the gravitational acceleration. Which of the following statements is true? Select all apply. T2 M O The net force along the y-component is non-zero. O The acceleration along the x-component is zero. O The net force along the x-component is zero. O The acceleration along the y-component is non-zero. O The acceleration along the y-component is zero. O The acceleration along the x-component is non-zero. O The net force along the y-component is zero. O The net force along the x-component is non-zero.

A block is on a frictionless table, on earth. The block accelerates at 2.6 m/s 2 when a 70 N horizontal force is applied to it. The block and table are set up on the moon. The acceleration due to gravity at the surface of the moon is 1.62 m/s 2. The weight of the block on the moon is closest to: O 38 N O 33 N O 27 N O 22 N O 44 N

A box has a mass of 2.50 kg is at rest on a horizontal frictionless surface. Four forces act on the box. The four forces are: F₁ = 20.0 N (North), F₂ = 30.0 N (East), F3 = 15.0 N (South), and F4 = 40.0 N (West). What is the resulting acceleration of the box? Select one: a. b. C. d. 4.47 m/² @ 26.6° (North of West) 31.3 m/2 @ 26.6° (West of North) 31.3 m/2 @ 26.6° (North of West) 4.47 m/2 @ 26.6° (West of North)

In Example 5.7, we pushed on two blocks on a table. Suppose three blocks are in contact with one another on a frictionless, horizontal surface as shown in the figure below. A horizontal force F is applied to m₁. Take m₁ = 2.00 kg, m₂ = 3.00 kg, m3 = 5.10 kg, and F = 16.0 N. (a) Draw a separate free-body diagram for each block. Choose File No file chosen This answer has not been graded yet. magnitude direction m₁ (b) Determine the acceleration of the blocks. m/s² m₂ m₂ |---Select--- ✓ (c) Find the resultant force on each block. block 1 N block 2 N block 3 N (d) Find the magnitudes of the contact forces between the blocks. between block 1 and 2 N N between block 2 and 3 Need Help? (e) You are working on a construction project. A coworker is nailing up plasterboard on one side of a light partition, and you are on the opposite side, providing "backing" by leaning against the wall with your back pushing on it. Every hammer blow makes your back sting. The supervisor helps you put a heavy…

Road Runner's revenge.  Wile E. Coyote is on the vertical front of a train that is accelerating. He is not standing on anything and is not holding on to anything. He is being held up solely by the frictional force between him and the front of the accelerating train. Coyote has a mass of 18.0 kg, and the coefficient of static friction is 0.20 for this situation. Determine the minimum acceleration required for the coyote to not slip down the front of the train.

On earth, a block sitting on a frictionless, horizontal table accelerates at 7.11 m/s² when a 40-N horizontal force is applied to it. The block and table are then moved to the moon where the acceleration due to gravity is 1.65 m/s². Find the magnitude of the block's weight wm on the moon. Wm = N

it it possible to find part b using cosine not sine?