* A squirrel jumps of a roof in the horizontal direction. The origin of the coordinate system is at the point where the squirrel leaves the roof Compete Table P4.55 by drawing crosses in the cells that correctly connect the physical quantities in the first column that describe the motion of me squirrel and me descriptions of what is happening to these quantities while me squirrel is in flight. Consider me squirrel as a point-like object and assume that the resistive force exerted by the air is negligible.
Table P4.55
Increases. | Decreases. | ||||||
Physical | Remains | Is | Increases | Decreases | then | then | |
quantity | constant | changing | only | only | decreases | increases | |
x-coordinate magnitudey-coordinate magnitudeDirection of velocityMagnitudeof velocityDirection of accelerationMagnitude of acceleration | |||||||
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
College Physics
Additional Science Textbook Solutions
Tutorials in Introductory Physics
The Cosmic Perspective Fundamentals (2nd Edition)
Essential University Physics (3rd Edition)
Cosmic Perspective Fundamentals
Sears And Zemansky's University Physics With Modern Physics
University Physics Volume 2
- Curling is a game similar to lawn bowling except it is played on ice and instead of rolling balls on the lawn, stones are slid along ice. A curler slides a stone across a sheet of ice with an initial speed vi in the positive x direction. The coefficient of kinetic friction between the stone and the curling lane is k. Express your answers in terms of vi, k, and g only. a. What is the acceleration of the stone as it slides down the lane? b. What distance does the curling stone travel?arrow_forwardGive reasons for the answers to each of the following questions: (a) Can a normal force be horizontal? (b) Can a normal force be directed vertically downward? (c) Consider a tennis ball in contact with a stationary floor and with nothing else. Can the normal force be different in magnitude from the gravitational force exerted on the ball? (d) Can the force exerted by the floor on the ball be different in magnitude from the force the ball exerts on the floor?arrow_forwarda. A particle of mass m accelerates from rest down a rough inclined plane, inclined at an angle 0 with respect to the horizontal and whose coefficient of friction is u. Apply Newton's laws in Cartesian coordinates to determine how far the particle will travel in time t. b. A particle of mass m is released on the side of a semicircular track that points downward. The radius of the semicircular track is R. Using Newton's second law in polar coordinates, determine how long it will take the particle to come back to the point of releasearrow_forward
- Draw a diagram of the situation and label the givens in the problem: The cart's mass and the hanger's mass. Also label the direction of the cart and hanger's acceleration. Draw two force diagrams. One for the cart and one for the hanger. You can treat the track as frictionless. Remember that the force in the string will be the same throughout the entire string. Then define an x-y coordinate system and find the x and y components of the forces in your diagrams.arrow_forwardPiles of snow on slippery roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a slope of 32 degrees. a.) What is the minimum value of the coefficient of static friction that will keep the snow from sliding down? Express your answer using two significant figures. b.) As the snow begins to melt, the coefficient of static friction decreases and the snow finally slips. Assuming that the distance from the chunk to the edge of the roof is 5.0 m and the coefficient of kinetic friction is 0.10, calculate the speed of the snow chunk when it slides off the roof. Express your answer to two significant figures and include the appropriate units. c.) f the roof edge is 12.5 m above ground, estimate the speed of the snow when it hits the ground. Express your answer to two significant figures and include the appropriate units.arrow_forwardA brick of mass m = 78 kg slides along a horizontal surface. The coefficient of friction between the brick and the surface is μk = 0.23. The brick has an initial speed of vo = 29 m/s in the positive x-direction as shown. a.) Write an expression for the x-component of the frictional force the brick experiences, Ff, in terms of the given variables and variables available in the palette. b.) What is the magnitude of the frictional force in N? c.) How far will the brick travel, in meters, before coming to rest?arrow_forward
- Question 1. a) Consider a uniform force field where the force acting on a body has the same magnitude everywhere, pointing in the same direction (along the y-axis). Derive the formulae for the range and height of a body launched with velocity v at an angle 0 to the x-axis. b) Give two different examples where you might find such a uniform force field. What is the acceleration on the body in each example? c) Consider a projectile launched on the surface of the Earth. How fast does its initial velocity need to be before the assumption of a uniform force field in part a) becomes invalid? (Assume a launch angle of 45°). Explain your answer. (Hint: you will probably need to account for the horizon on Earth).arrow_forwardc. Four forces in a plane, act at a point O, the values and directions of the forces are being as shown in figure 2. Prove that the direction of the resultant of this force is 18.8°. Demonstrate the steps that you will take to determine the value of the magnitude of the resultant. 30 N 60 50N 30 20 N 10 Narrow_forwardAn airplane flies at a constant speed in a horizontal straight path. Two horizontal forces act on the plane: the thrust of the propeller and air resistance. Which of the following statements can be correctly drawn from the scenario above? * The plane is being dragged by air, causing it to decelerate. O Forces are acting on the plane, so it will accelerate. O The net force acting on the plane is zero. The thrust of the propeller is greater than the air resistance, causing the plane to move forward.arrow_forward
- d. Force is a vector quantity and thus has both a magnitude and a direction. A vector can be represented graphically by a line drawn to scale in the direction of the line of action of the force. To distinguish between vector and scalar quantities, various ways are used. Identify and explain three of these ways.arrow_forwarde the internet. Open network login page Automatic Zoom 25.A block of mass m2 (10 kg) on a smooth, horizontal surface is connected to a second mass m1 (5 kg) by a light cord over a light, frictionless pulley as shown in figure 4 below. A force F of magnitude 80 N is applied to mass m2 as shown. The applied force F is at an angle of 35° with the horizontal. Figure 4 For mass m2,Fy=arrow_forwardNewton's first law states that: Group of answer choices Ia. n the absence of any net force acting on it, a mechanical system is necessarily at rest. b. In the absence of a non-zero net force acting on it, a mechanical system keeps moving in the same direction at the same speed (including the case v=0). c. For any pair A/B of objects interacting with one another, the force of A acting on B is the equal-opposite of the force of B acting on A. d. The rate of change of the velocity of a system is proportional to the net force acting on it.arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning