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asked 2020-11-02

A gun is fired vertically into a 1.40 kg block of wood at rest directly above it. If the bullet has a mass of 21.0 g and a speed of 210 m/s, how high will the block rise into the air after the bullet becomes embedded in it?

asked 2020-11-09

A 7.0- g bullet is fired into a 1.5- kg ballistic pendulum.The bullet emerges from the block with a speed of 200 m/s, and theblock rises to a maximum height of 12 cm. Find the initial speed ofthe bullet.

asked 2021-01-31

asked 2022-01-16

An 8.00-cm-diameter, 360 g solid sphere is released from rest at the top of a 1.8-m-long, 17.0 incline. It rolls, without slipping, to the bottom. What is the sphere’s angular velocity at the bottom of the incline? What fraction of its kinetic energy is rotational?

asked 2021-03-11

An indestructible bullet 2.00 cm long is fired straight through a board that is 10.0 cm thick. The bullet strikes the boardwith a speed of 470 m/s and emerges with a speed of 250 m/s. (To simplify,assume that the bullet accelerates only while the front tip is incontact with the wood.)

(a) What is the average acceleration of the bullet through the board?

(b) What is the total time that the bullet is in contact with the board?

(c) What thickness of board (calculated to 0.1 cm) would it take to stop the bullet, assuming that the acceleration through all boards the same?

(a) What is the average acceleration of the bullet through the board?

(b) What is the total time that the bullet is in contact with the board?

(c) What thickness of board (calculated to 0.1 cm) would it take to stop the bullet, assuming that the acceleration through all boards the same?

asked 2021-12-16

A 23.0 g ball is fired horizontally with initial speed v0 toward a 110 g ball that is hanging motionless from a 1.00 m -long string. The balls undergo a head-on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle \(\displaystyle\theta_{{\max}}={51.0}^{\circ}\)

What was \(\displaystyle{v}_{{0}}\)?

What was \(\displaystyle{v}_{{0}}\)?

asked 2021-05-12