It feels better to catch a hard ball while wearing a padded glove than to catch it bare handed. Use the ideas of this chapter to explain why

Short Answer

Expert verified

The padded glove increases the time of the contact between the ball and the hands, so less force is exerted.

Step by step solution

01

Given information

We have given that It feels better to catch a hard ball while wearing a padded glove than to catch it bare handed

We need to find that the ideas of this chapter to explain why

02

Simplify

The force with a short time when an object receives a force is called the impulse, so it is the area under the curve of the force-versus-time graph and it is the same as momentum. The impulse is the quantity Jxand it is given as

impulse=Jx=Fxt (1)

From equation (1)for Fx

Fx=Jxt=pt (2)

The force is inversely proportional to the time tas mentioned above. To reduce the force the time must increases. The padded glove increases the time of the contact between the ball and the hands, so less force is exerted. When the hands are bare, the time of contact decreases, so the force increases causes.

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Most popular questions from this chapter

Section 11.6 found an equation for vmax of a rocket fired in deep space. What is vmax for a rocket fired vertically from the surface of an airless planet with free-fall acceleration g? Referring to Section 11.6, you can write an equation for ∆Py, the change of momentum in the vertical direction, in terms of dm and dvy. ∆Py is no longer zero because now gravity delivers an impulse. Rewrite the momentum equation by including the impulse due to gravity during the time dt during which the mass changes by dm. Pay attention to signs! Your equation will have three differentials, but two are related through the fuel burn rate R. Use this relationship—again pay attention to signs; m is decreasing—to write your equation in terms of dm and dvy. Then integrate to find a modified expression for vmax at the instant all the fuel has been burned.

a. What is vmax for a vertical launch from an airless planet ? Your answer will be in terms of mR, the empty rocket mass; mF0, the initial fuel mass; vex, the exhaust speed; R, the fuel burn rate; and g.

b. A rocket with a total mass of 330,000 kg when fully loaded burns all 280,000 kg of fuel in 250 s. The engines generate 4.1 MN of thrust. What is this rocket’s speed at the instant all the fuel has been burned if it is launched in deep space ? If it is launched vertically from the earth?

0.10kg+0.20kgv1x=(0.10kg)(3.0m/s)12(0.30kg)(0m/s2)+12(3.0N/m)(x2)2=12(0.30kg)(v1x)2+12(3.0N/m)(0m)2

a. Write a realistic problem for which this is the correct equation(s).

b. Finish the solution of the problem, including a pictorial representation.

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What is the magnitude of the momentum of

a. A 3000kgtruck traveling at 15m/s?

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What impulse does the force shown in FIGURE EX11.3 exert on a 250gparticle?

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