Question 1

The linear density of a rod, in g/m, is given by $\lambda=40.0+30.0 x$ . The rod extends from the origin to x = 0.400 m. What is the mass of the rod?
A)0.213 g
B)3.50 g
C)3.84 g
D)18.4 g
E)20.8 g

Accepted Answer

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Question 2

High-speed stroboscopic photographs show that the head of a golf club of mass 200 grams is travelling at 55.0 m/s just before it strikes a 46.0-gram golf ball at rest on a tee. After the collision, the clubhead travels (in the same direction) at 40.0 m/s. Find the speed of the golf ball just after impact.

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Question 3

A uniform thin wire has a length $L=\pi R$ and is bent into a semicircular arc of radius R. If the wire starts at (x, y) = (R, 0) and curves counterclockwise to (x, y) = (-R, 0), what is the y coordinate of its centre of mass?

Accepted Answer

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Question 4

A child bounces a 50-gram superball on the sidewalk. The velocity of the superball changes from 21 m/s downward to 19 m/s upward. If the contact time with the sidewalk is 1/800 s, what is the magnitude of the force exerted on the superball by the sidewalk?

Accepted Answer

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Question 5

A bowler claims he can throw a cricket ball with as much momentum as a 3.00-g bullet moving with a speed of 1500 m/s. A cricket ball has a mass of 0.145 kg. What must be its speed if the bowler's claim is valid?

Accepted Answer

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Question 6

The linear density of a rod, in g/m, is given by $\lambda=40.0+30.0 x$ . The rod extends from the origin to x = 0.400 m. What is the location of the centre of mass of the rod?
A)x = 0.213 m
B)x = 0.315 m
C)x = 0.384 m
D)x = 0.184 m
E)x = 0.208 m

Accepted Answer

The answer of The linear density of a rod, in...

Question 7

A U-238 nucleus (mass = 238 units) decays, transforming into an alpha particle (mass = 4.00 units) and a residual thorium nucleus (mass = 234 units). If the uranium nucleus was at rest, and the alpha particle has a speed of 1.50 * 107 m/s, determine the recoil speed of the thorium nucleus.

Accepted Answer

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Quiz 8: Linear Momentum and Collisions

The linear density of a rod, in g/m, is given by λ=40.0+30.0x\lambda=40.0+30.0 xλ=40.0+30.0x . The rod extends from the origin to x = 0.400 m. What is the mass of the rod?

A uniform thin wire has a length L=πRL=\pi RL=πR and is bent into a semicircular arc of radius R. If the wire starts at (x, y) = (R, 0) and curves counterclockwise to (x, y) = (-R, 0), what is the y coordinate of its centre of mass?

A child bounces a 50-gram superball on the sidewalk. The velocity of the superball changes from 21 m/s downward to 19 m/s upward. If the contact time with the sidewalk is 1/800 s, what is the magnitude of the force exerted on the superball by the sidewalk?

A bowler claims he can throw a cricket ball with as much momentum as a 3.00-g bullet moving with a speed of 1500 m/s. A cricket ball has a mass of 0.145 kg. What must be its speed if the bowler's claim is valid?

The linear density of a rod, in g/m, is given by λ=40.0+30.0x\lambda=40.0+30.0 xλ=40.0+30.0x . The rod extends from the origin to x = 0.400 m. What is the location of the centre of mass of the rod?

A U-238 nucleus (mass = 238 units) decays, transforming into an alpha particle (mass = 4.00 units) and a residual thorium nucleus (mass = 234 units). If the uranium nucleus was at rest, and the alpha particle has a speed of 1.50 * 107 m/s, determine the recoil speed of the thorium nucleus.

The linear density of a rod, in g/m, is given by $\lambda=40.0+30.0 x$ . The rod extends from the origin to x = 0.400 m. What is the mass of the rod?

A uniform thin wire has a length $L=\pi R$ and is bent into a semicircular arc of radius R. If the wire starts at (x, y) = (R, 0) and curves counterclockwise to (x, y) = (-R, 0), what is the y coordinate of its centre of mass?

The linear density of a rod, in g/m, is given by $\lambda=40.0+30.0 x$ . The rod extends from the origin to x = 0.400 m. What is the location of the centre of mass of the rod?