Multiple Choice
The Mars Rover Perseverance weighed about 10,000 N while on Earth. After it reached the surface of Mars, it weighed about 3790 N. What is the gravitational acceleration on Mars?
6. Intro to Forces (Dynamics)
Vertical Forces & Acceleration
Back6. Intro to Forces (Dynamics)
Vertical Forces & Acceleration
- Multiple Choice
A 3-kg bucket is being pulled upwards by a cord. The tension in the cord is 35 N. What is the acceleration of the bucket? (The mass of the cord is negligible, which means you can assume m_cord = 0.)
- Multiple ChoiceA ball is dropped from a tall building. At one instant the force of drag on the ball was . What was the magnitude of the ball's acceleration at that instant?
- Multiple ChoiceFernanda is standing on a scale while riding an elevator. If the scale reads while the elevator is accelerating upwards at , what is Fernanda's mass?
- Open QuestionYou walk into an elevator, step onto a scale, and push the 'up' button. You recall that your normal weight is 625 N. Draw a free-body diagram. (b) If you hold a 3.85-kg package by a light vertical string, what will be the tension in this string when the elevator accelerates as in part (a)?
- Open QuestionAt the surface of Jupiter's moon Io, the acceleration due to gravity is g = 1.81 m/s2. A watermelon weighs 44.0 N at the surface of the earth. (b) What would be its mass and weight on the surface of Io?
- Open QuestionAt the surface of Jupiter's moon Io, the acceleration due to gravity is g = 1.81 m/s2. A watermelon weighs 44.0 N at the surface of the earth. (a) What is the watermelon's mass on the earth's surface?
- Open QuestionAn astronaut's pack weighs 17.5 N when she is on the earth but only 3.24 N when she is at the surface of a moon. (a) What is the acceleration due to gravity on this moon?
- Open QuestionYou walk into an elevator, step onto a scale, and push the 'up' button. You recall that your normal weight is 625 N. Draw a free-body diagram. (a) When the elevator has an upward acceleration of magnitude 2.50 m/s2, what does the scale read?
- Open Question
A fisherman yanks a fish vertically out of the water with an acceleration of 2.5 m/s² using very light fishing line that has a breaking strength of 183 N (≈ 4lb) . The fisherman unfortunately loses the fish as the line snaps. What can you say about the mass of the fish?
- Open QuestionA light rope is attached to a block with mass 4.00 kg that rests on a frictionless, horizontal surface. The horizontal rope passes over a frictionless, massless pulley, and a block with mass m is suspended from the other end. When the blocks are released, the tension in the rope is 15.0 N. (d) How does the tension compare to the weight of the hanging block?
- Open QuestionThree sleds are being pulled horizontally on frictionless horizontal ice using horizontal ropes (Fig. E5.14). The pull is of magnitude 190 N. Find (b) the tension in ropes A and B.
- Open QuestionTwo 25.0-N weights are suspended at opposite ends of a rope that passes over a light, frictionless pulley. The pulley is attached to a chain from the ceiling. (b) What is the tension in the chain?
- Open QuestionTwo 25.0-N weights are suspended at opposite ends of a rope that passes over a light, frictionless pulley. The pulley is attached to a chain from the ceiling. (a) What is the tension in the rope?
- Open QuestionA 550-N physics student stands on a bathroom scale in an elevator that is supported by a cable. The combined mass of student plus elevator is 850 kg. As the elevator starts moving, the scale reads 450 N. (a) Find the acceleration of the elevator (magnitude and direction).