m to reach a speed of 10.0-? (c) After reaching that speed, the pilot turns off the engine and S drifts to a stop over a distance of 40.0m. Find the resistance force, assuming it's constant. 6. Two dogs are pulling a sled with mass 1.50 10kg along a snow trail. The rope connected to the first dog makes an angle of u = 25.0 with respect to the direction of the trail, while the rope connected to the second dog makes an angle of u = 235.0. Find the initial acceleration of the sled, starting at rest, if each dog exerts a force of magnitude 5.00 10N on the sled. Ignore forces of resistance on the sled. 7. An astronaut on a space mission lands on a planet with five times the mass and four times the radius of Earth. What is her weight wX on this planet as a multiple of her Earth weight WE? 8. (a) Find the gravitational force exerted by Mars on a 90.0kg man located at the Earth's equator at opposition, when the man is closest to Mars. (b) Calculate the gravitational force of Mars on the man at conjunction, when he is farthest from Mars. (c) Calculate the difference in the acceleration due to Mars between opposition and conjunction. 9. A jet ski with mass 1.50 10kg, including the passenger, has an engine that produces a net horizontal force of 5.70 10N, after accounting for forces of resistance. (a) Find the acceleration of the jet ski. (b) Starting from rest, how long does it take the jet ski to reach a m speed of 8.0? (c) After reaching that speed, the pilot turns off the engine and drifts to a S stop over a distance of 30.0m. Find the resistance force, assuming it's constant. 10. Two mules are pulling a wagon with mass 2.50 103kg along a dirt road. The rope connected to the first mule makes an angle of u = 40.0 with respect to the direction of the road, while the rope connected to the second mule makes an angle of u = 260.0. Find the initial acceleration of the wagon, starting at rest, if each mule exerts a force of magnitude 6.50 10N on the wagon. Ignore forces of resistance on the wagon. 1. A hovercraft with mass4.00 102kg, including the passenger, has an engine that produces a net horizontal force of 8.50 10N, after accounting for forces of resistance. (a) Find the acceleration of the hovercraft. (b) Starting from rest, how long does it take the hovercraft to m reach a speed of 15.0 -? (c) After reaching that speed, the pilot turns off the engine and S drifts to a stop over a distance of 60.0 m. Find the resistance force, assuming it's constant. 2. Two oxen are pulling a cart with mass 3.00 103kg along a road. The rope connected to the first ox makes an angle of u = 35.0 with respect to the direction of the road, while the rope connected to the second ox makes an angle of u = 250.0. Find the initial acceleration of the cart, starting at rest, if each ox exerts a force of magnitude 7.00 10N on the cart. Ignore forces of resistance on the cart. 3. An astronaut on a space mission lands on a planet with four times the mass and three times the radius of Earth. What is his weight wX on this planet as a multiple of his Earth weight WE? 4. (a) Find the gravitational force exerted by the Moon on an 80.0kg man located at the Earth's equator at full moon, when the man is closest to the Moon. (b) Calculate the gravitational force of the Moon on the man at new moon, when he is farthest from the Moon. (c) Calculate the difference in the acceleration due to the Moon between full moon and new moon. 5. A speedboat with mass 2.50 10kg, including the passenger, has an engine that produces a net horizontal force of 6.70 102N, after accounting for forces of resistance. (a) Find the acceleration of the speedboat. (b) Starting from rest, how long does it take the speedboat