A 1.6-kg block is attached to the end of a 2.0-m string to form a pendulum. The pendulum is released from rest when the string is horizontal. At the lowest point of its swing when it is moving horizontally, the block is hit by a 10-g bullet moving horizontally in the opposite direction. The bullet remains in the block and causes the block to come to rest at the low point of its swing. What was
the magnitude of the bullet's velocity just before hitting the block?
a. 1.0 km/s
b. 1.6 km/s
c. 1.2 km/s
d. 1.4 km/s
e. 1.8 km/s
A
You might also like to view...
Which of the following methods allows us to determine the size of an extrasolar planet around another star?
A) detection of brightness changes in a star as a planet passes in front of it B) detection of reflected starlight C) regular changes in the positions of the parent stars with respect to more distant stars as they move across the sky D) detection of Doppler shifts in the spectra of the parent stars
The condition for total internal reflection can be predicted from Snell's law since
A) the index of refraction of glass is about 1.5. B) the index of refraction of plastic is about 1.5. C) the value of tangent can be 1.0. D) the maximum value of the sine is 1.0. E) the maximum value of the sine is 1.5.
You hit a tennis ball over the net. When the ball reaches its maximum height, its speed is
A) equal to its initial speed. B) less than its initial speed. C) greater than its initial speed. D) zero. E) g?t.
When is the average acceleration of an object equal to the instantaneous acceleration?
A) always B) never C) only when the acceleration is constant D) only when the acceleration is increasing at a constant rate E) only when the acceleration is decreasing at a constant rate