The vertical component of the acceleration of a sailplane is zero when the air pushes up against its wings with a force of 3.16 kN. Assuming that the only forces on the sailplane are that due to gravity and that due to the air pushing against its wings, what is the gravitational force on the Earth due to the sailplane (enter first)? Is that force upward or downward?

If the wing stalls and the upward force decreases to 2.16 kN, what is the acceleration of the sailplane (enter first)? Is it upward or downward?

The accelerating force of the wind on a small 250-kg sailboat is 707 N northeast. If the drag of the keel is 500 N acting west, what is the acceleration of the boat?Select one:a.1.5 m/s2 due eastb.2.5 m/s2 due northc.2.0 m/s2 due northd.3.0 m/s2 northeast

A possible means of space flight is to place a perfectly reflecting aluminized sheet into orbit around the Earth and then use the light from the Sun to push this "solar sail." Suppose a sail of area A = 7.20 ✕ 105 m2 and mass m = 6,600 kg is placed in orbit facing the Sun. Ignore all gravitational effects and assume a solar intensity of 1,370 W/m2.(a)What force (in N) is exerted on the sail? (Enter the magnitude.) N(b)What is the sail's acceleration? (Enter the magnitude in µm/s2.) µm/s2(c)Assuming the acceleration calculated in part (b) remains constant, find the time interval (in days) required for the sail to reach the Moon, 3.84 ✕ 108 m away, starting from rest at the Earth. days(d)What If? If the solar sail were initially in Earth orbit at an altitude of 380 km, show that a sail of this mass density could not escape Earth's gravitational pull regardless of size. (Calculate the magnitude of the gravitational field in m/s2.) m/s2(e)What would the mass density (in kg/m2) of the solar sail have to be for the solar sail to attain the same initial acceleration as that in part (b)? kg/m2

A 2000-kg sailboat experiences an eastward force of 2000 N by the ocean tide and a wind force against its sails with magnitude of 6000 N directed toward the northwest (45° N of W). What is the direction of the resultant acceleration?Select one:a.62° N of Wb.30° N of Ec.60° N of Ed.74° N of W

A model sailboat is slowly sailing west across a pond at 0.310 m/s. A gust of wind blowing at 28.3° south of west gives the sailboat a constant acceleration of magnitude 0.314 m/s2 during a time interval of 2.18 s. If the net force on the sailboat during the 2.18-s interval has magnitude 0.318 N, what is the sailboat's mass?