Two blocks are attached by a compressed spring and are initially held at rest on a frictionless surface. The blocks are the released simultaneously. If block 1 has four times the mass of block 2, which of the following quantities is the same for both blocks as the spring pushed the . Average velocity = change in position time taken = 25 m - 4 m s - s If the load on the wire is increased, If the car is moving at constant velocity, the total horizontal force is zero; so F = D, the magnitude of the air resistance (drag) Size: KB. Chapter 3 Kinetics of Particles Question 3–1 A particle of mass m moves in the vertical plane along a track in the form of a circle as shown in Fig. P The equation for the track is r = r0 cosθ Knowing that gravity acts downward and assuming the initial conditions θ(t = 0) = 0 and θ(t˙ = 0) = θ˙0, determine (a) the diﬀerential equation of motion for the particle and (b) the force File Size: KB. the ball’s velocity immediately before it hits the ground. 12 m/s 1 m Solution: (a) Find the height above the ground mg(1m−h) = 0 − 1 2 mv2 0, h = v0 2 2g +1m= (10 m/s)2 ( m/s2) +1m= m (b) When the ball returns to the same level, the velocity must be equal to the initial velocity (but now it is moving downward) because the net.

A 35 kg crate undergoes a horizontal acceleration of on a level surface when pulled by a N force. What is the coefficient of kinetic friction between the crate and the surface? Solution. Problem A block of mass kg is sliding at an initial velocity of m/s along horizontal surface to the right. Chapter 4. Force and Motion. Force may be defined as the cause of motion and a force is applied to an object, the object either moves or changes shape or most cases, it is not possible to detect the deformation by naked eyes at the molecular or atomic level. Q4. In three situations, a brieﬂy applied horizontal force changes the velocity of a hockey puck that slides over frictionless ice. The overhead views of Fig. indicate, for each situation, the puck’s initial speed v i, its ﬁnal speed v f, and the directions of the corresponding velocity vectors. Rank theFile Size: 40KB. The equations predict that the moving particle will come to rest (v 1 = 0) and the initially stationary particle will "steal" its velocity (v 2 = v). In effect, the two particles trade velocities. This happens (Try it!). Case 1: m 1 is much greater than m 2. What happens if a .

A kg load of bricks hangs from one end of a rope that passes over a small, frictionless pulley. A kg counterweight is suspended from the other end of the rope, as shown in Fig. The system is released from rest. a) Draw a free-body diagram for the load of . Physics / Labs ~ General Guidelines The Physics and labs will be divided into small groups (so you will either be working with one lab partner, or, for the larger classes, in a small group). You and your lab partner(s) will work together, but you each must submit an individual lab report, with a discussion of the labFile Size: 1MB. (’Force,’momentum,’and’speed’’ (’Free’body(diagrams’ A block sits at rest on a frictionless surface. Which of the following sketches most closely resembles the correct free-body diagram for all forces acting on the block? (Each red arrow velocity to the right on the frictionless surface. Statics is the study of the forces keeping an object in place. Forces, such as gravity, act upon or within an object even if that object is not moving. Static equations are often used in truss problems. To solve a static equation, engineers use a free body diagram. R Upper step h P Lower step 1. The above diagram shows a beam with curvature.