Category: 04. Momentum

3.  What is linear momentum? 4.  If an object’s mass is constant, what is its momentum proportional to? 5.  What is the equation for Newton’s second law of motion, in terms of mass, velocity, and time, when the mass of the system is constant? 6.  Give an example of a system whose mass is not…

1 .  A 5 kg bowling ball is rolled with a velocity of 10 m/s. What is its momentum? 2 . (credit: modification of work from Pinterest) A 155-g baseball is incoming at a velocity of 25 m/s. The batter hits the ball as shown in the image. The outgoing baseball has a velocity of 20 m/s…

During 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 ball by Williams’ racquet? Assume that the ball’s speed just after impact was 58 m/s, the horizontal…

(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. STRATEGY No information is given about the direction of the football player or the football, so we can calculate only…

Cars during the past several decades have gotten much safer. Seat belts play a major role in automobile safety by preventing people from flying into the windshield in the event of a crash. Other safety features, such as airbags, are less visible or obvious, but are also effective at making auto crashes less deadly (see Figure…

In this activity you will experiment with different types of hand motions to gain an intuitive understanding of the relationship between force, time, and impulse. Procedure: What are some other examples of motions that impulse affects?

When Newton’s second law is expressed in terms of momentum, it can be used for solving problems where mass varies, since Δ𝐩=Δ(𝑚𝐯)Δp=Δ(�v) . In the more traditional form of the law that you are used to working with, mass is assumed to be constant. In fact, this traditional form is a special case of the law, where…

Linear momentum is the product of a system’s mass and its velocity. In equation form, linear momentum p is 𝐩=𝑚𝐯.�=��. You can see from the equation that momentum is directly proportional to the object’s mass (m) and velocity (v). Therefore, the greater an object’s mass or the greater its velocity, the greater its momentum. A large, fast-moving object has greater momentum…