The center of mass of a system of particles (or objects) with total mass M moves like a single particle of mass M acted upon by the same net external force
Indicate whether the statement is true or false
TRUE
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Answer the following statement(s) true (T) or false (F)
1. If two moving objects collide, we can always orient our reference frame so that the collision takes place entirely in the xy plane 2. An object of mass m1 moving in the +x direction collides with another object at rest with mass m2. After the collision, the object with mass m2 is observed moving in the +y direction. Such a collision cannot be elastic, no matter what m1 and m2 might be.
When a planet's orbit takes it closest to the Sun, it's called
A) vernal equinox. B) perihelion. C) aphelion. D) crossing the ecliptic. E) none of the above; a planet's distance from the Sun never changes.
When a drag strip vehicle reaches a velocity of 65.0 m/s, it begins a negative acceleration by releasing a drag chute and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight-line path is a constant ?7.10 m/s2 . What displacement does it undergo during this deceleration period?
a. 595 m b. 4.58 m c. 2 110 m d. 298 m e. 9.15 m
A certain pendulum consists of a 1.5-kg mass swinging at the end of a string (length = 2.0 m). At the lowest point in the swing the tension in the string is equal to 20 N. To what maximum height above this lowest point will the mass rise during its oscillation?
a. 77 cm b. 50 cm c. 63 cm d. 36 cm e. 95 cm