Neglecting air resistance, a 1.0-kg projectile has an escape velocity of about 11 km/s at the surface of Earth. The corresponding escape velocity for a 2.0 kg projectile (in km/s) is:

A body is projected from the earth's surface with the intention of letting it escape from the earth's gravitational field. What is the minimum escape velocity of the body? [Earth's radius = 6.4 x 103km, g = 10ms-2]

If the Earth had no atmosphere and were a perfectly smooth sphere, one could launch a projectile into a circular orbit just above the ground. Given that the mass of Earth is 5.98 × 1024 Kg5.98 × 1024 Kg  and its radius is  6.37 × 106 m6.37 × 106 m , how much kinetic energy would be required to send a 2 km ball into such an orbit?

A projectile returns to its original height 4.08 s after being launched, during which time it travels 76.2 m horizontally.If air resistance can be neglected, what was the projectile's initial speed?Express your answer in m/s.

After a projectile is fired into the air, what is the magnitude of the acceleration in the y-direction? (Assume no air resistance.)A.9.8 m/s2B.19.6 m/s2C.0 m/s2D.4.9 m/s2

A projectile is launched from the edge of a cliff with a velocity of 15.0 m/s at an angle of 30.0 degrees above the horizontal. Ignoring air resistance, what is the velocity of the projectile 2.00 seconds later?