manojit665

Force and Acceleration
1. How much force is needed to accelerate a 1500 kg racecar at 3.0m/s2?
2. You are driving a 2500 kg car at 14 m/s. A basketball rolls intothe road ahead. You slam on the brakes. The wheels lock and thetires begin to skid. You stop in a distance of 25 m.
(a) What is your rate of deceleration?
(b) How much force was needed?
3. Amy and Bill are standing together wearing roller-skates. Amypushes Bill giving him an acceleration of 4 m/s2. If Bill has amass of 100 kg and Amy has a mass of 80 kg, what is Amy’sacceleration?
4. A towrope is used to pull a 1750 kg boat. The boat isaccelerating at 1.35 m/s2. How much force is being used to pull theboat?
5. How much force is needed to accelerate an 8.5 gram bullet at18,500 m/s2?
6. A force of 4600 N accelerates a 1650 kilogram car. What is theacceleration of the car?
7. A track and field shot-putter exerts a force of 140 N toaccelerate the shot 19 m/s2. What is the mass of the shot?
8. How much force is acting on a 1 kg apple in free-fall?
9. How much force is acting on a 20 kilogram bushel of apples infree-fall?
10. A 55 kg projectile is fired from rest to a speed of 770 m/sthrough a distance of 1.5 m.
(a) What is the acceleration of the projectile?
(b) How much force accelerated the projectile?
11. On the amusement park ride known as Superman, powerful magnetsaccelerate a car and its riders from rest to 100 mph in 7.0 s. Themass of the car and riders is 5500 kg.
(a) What is the acceleration of the car and riders?
(b) How much force is needed for this acceleration?
12. When a 58 gram tennis ball is served, the ball accelerates fromrest to 45 m/s through a distance of 0.44 m.
(a) What is the acceleration of the tennis ball?
(b) How much force accelerates the tennis ball?
13. A person with a black belt in karate can accelerate her 700gram fist from rest to 8.0 m/s in 0.15 s.
(a) Calculate the acceleration of the fist?
(b) How much force is needed to do this?
14. A 1 kilogram apple in free-fall has an acceleration of 9.8 m/s2due to pull of the Earth. According to Newton’s Third Law ofMotion, the apple must pull on the Earth. If the Earth has a massof 5.96x1024 kg, the Earth will accelerate toward the falling appleat what rate?