Extra motion word problems
1. A large motorcycle weighs 2450. N. What is its mass? (250.0 kg)
2. A car moving 35. m/s accelerates at 4.0 m/s2. Calculate the velocity of the car after 10. s. (75. m/s)
3. A 1500. kg car accelerates from 20. m/s to 50. m/s in 6.0 s. Calculate the average force on the car during the 6.0 s interval. (7.5 x 103 N)
4. An 80. kg boy and a 50. kg girl pull on opposite ends of a rope while standing on wet ice (a frictionless surface). If the girl accelerates toward the boy at 4.0 m/s2, how fast would the boy accelerate toward her? (2.5 m/s2)
5. The mass of an object is 12. kg on Earth. What is the weight on Saturn, where the acceleration due to gravity is about 30. m/s2? (3.6 x 102 N)
6. Find the uniform acceleration that causes a car’s velocity to change from 32.0 m/s to 96.0 m/s in an 8.0 second period. (8.0 m/s2)
7. A car with a velocity of 22.0 m/s is accelerated uniformly at the rate of 1.6 m/s2 for 6.8 seconds. What is its final velocity? (33. m/s)
8. You place a watermelon on a spring scale to the supermarket. If the mass of the watermelon is 4.0 kg, what is the reading on the scale? (39. N)
9. Karmaria is learning how to ice-skate. She wants her mother to pull her along so that she has an acceleration of 0.80 m/s2. If Kamaria’s mass is 27.2 kg, with what force does her mother need to pull her? (Neglect any resistance between the ice and Kamaria’s skates) (22. N)
10. A 873. kg dragster, starting from rest, attains a speed of 26.3 m/s in 0.59 seconds. Find the magnitude of the net force on the dragster during this time. (3.9 x 104 N)
11. A grocery sack can withstand a maximum of 230. N before it rips. Will a bag holding 15.0 kg of groceries that is lifted from the checkout counter at an acceleration of 7.0 m/s2 hold? (105 N – yes)