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Exercícios de momento e colisões · Physics Playground

ExercíciosFísica

Momento e colisões

13 problemas com soluções resolvidas, de Physics e College Physics.

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Physics8.1 Linear Momentum, Force, and Impulse

ExemploCalculating Momentum: A Football Player and a Football(a) Calculate the momentum of a 110 kg football player running at 8 m/s. (b) Compare the player’s momentum with the momentum of a 0.410 kg football thrown hard at a speed of 25 m/s.
ExemploCalculating Force: Venus Williams’ RacquetDuring the 2007 French Open, Venus Williams (Figure 8.3) hit the fastest recorded serve in a premier women’s match, reaching a speed of 58 m/s (209 km/h). What was the average force exerted on the 0.057 kg tennis…Com figura

Physics8.3 Elastic and Inelastic Collisions

ExemploCalculating Velocity: Inelastic Collision of a Puck and a GoalieFind the recoil velocity of a 70 kg ice hockey goalie who catches a 0.150-kg hockey puck slapped at him at a velocity of 35 m/s. Assume that the goalie is at rest before catching the puck, and friction between the…Com figura
ExemploCalculating Final Velocity: Elastic Collision of Two CartsTwo hard, steel carts collide head-on and then ricochet off each other in opposite directions on a frictionless surface (see Figure 8.10). Cart 1 has a mass of 0.350 kg and an initial velocity of 2 m/s. Cart 2 has a…Com figura
ExemploCalculating Final Velocity in a Two-Dimensional CollisionSuppose the following experiment is performed (Figure 8.11). An object of mass 0.250 kg (m1) is slid on a frictionless surface into a dark room, where it strikes an initially stationary object of mass 0.400 kg (m2).…Com figura

College Physics8.1 Linear Momentum and Force

Exemplo 8.1Calculating Momentum: A Football Player and a Football(a) Calculate the momentum of a 110-kg football player running at 8.00 m/s. (b) Compare the player’s momentum with the momentum of a hard-thrown 0.410-kg football that has a speed of 25.0 m/s.
Exemplo 8.2Calculating Force: Venus Williams’ RacquetDuring the 2007 French Open, Venus Williams hit the fastest recorded serve in a premier women’s match, reaching a speed of 58 m/s (209 km/h). What is the average force exerted on the 0.057-kg tennis ball by Venus…

College Physics8.2 Impulse

Exemplo 8.3Calculating Magnitudes of Impulses: Two Billiard Balls Striking a Rigid WallTwo identical billiard balls strike a rigid wall with the same speed, and are reflected without any change of speed. The first ball strikes perpendicular to the wall. The second ball strikes the wall at an angle of…

College Physics8.4 Elastic Collisions in One Dimension

Exemplo 8.4Calculating Velocities Following an Elastic CollisionCalculate the velocities of two objects following an elastic collision, given that m1 = 0. 500 kg, m2 = 3. 50 kg, v1 = 4. 00 m/s, and v2 = 0. 8.36

College Physics8.5 Inelastic Collisions in One Dimension

Exemplo 8.5Calculating Velocity and Change in Kinetic Energy: Inelastic Collision of a Puck and a Goalie(a) Find the recoil velocity of a 70.0-kg ice hockey goalie, originally at rest, who catches a 0.150-kg hockey puck slapped at him at a velocity of 35.0 m/s. (b) How much kinetic energy is lost during the collision?…Com figura
Exemplo 8.6Calculating Final Velocity and Energy Release: Two Carts CollideIn the collision pictured in Figure 8.10, two carts collide inelastically. Cart 1 (denoted m1 carries a spring which is initially compressed. During the collision, the spring releases its potential energy and…

College Physics8.6 Collisions of Point Masses in Two Dimensions

Exemplo 8.7Determining the Final Velocity of an Unseen Object from the Scattering of Another ObjectSuppose the following experiment is performed. A 0.250-kg object m1 is slid on a frictionless surface into a dark room, where it strikes an initially stationary object with mass of 0.400 kg m2. The 0.250-kg object…

College Physics8.7 Introduction to Rocket Propulsion

Exemplo 8.8Calculating Acceleration: Initial Acceleration of a Moon LaunchA Saturn V’s mass at liftoff was 2.80×10^6kg, its fuel-burn rate was 1.40×10^4kg/s, and the exhaust velocity was 2.40×10^3m/s. Calculate its initial acceleration.