create his teachers parent group email lists.Newton’s Laws of Motion Review
Physics
- Two forces are acting on the block (m = 10 kg) shown below. What is the horizontal acceleration (magnitude and direction) of the block? (The surface is frictionless.)
- Two forces are acting on the block (m = 15 kg) in the figure shown. What is the horizontal acceleration (magnitude and direction) of the block? (The surface is frictionless.)
- Three forces are acting on the block (m = 5.0 kg) shown below. Calculate the net force (magnitude and direction) in x and y. F1 is directed at 45 degrees.
- In the diagram shown below, three forces are acting on the block (m = 20 kg). Calculate the net force in the x and y direction. These three forces are the only forces acting on the block!
- An African elephant can reach heights of 13 feet and possess a mass of as much as 6000 kg. Determine this weight of an African elephant.
- With fuel prices for combustible engine automobiles increasing, researchers and manufacturers have given more attention to the concept of an ultra-light car. Using carbon composites, lighter steels and plastics, a fuel-efficient car can be manufactured at 540 kg. How much less does an ultra-light car weigh compared to a 1450-kg Honda Accord (2007)?
- According to the National Center for Health Statistics, the average mass of an adult American male is 86 kg. Determine the mass and the weight of an 86-kg man on the moon where the gravitational field is one-sixth that of the Earth
- Captain John Stapp of the U.S. Air Force tested the human limits of acceleration by riding on a rocket sled of his own design. His rocket sled, known as the Gee Whiz, had a mass of about 82 kg. What net force would be required to accelerate the Gee Whiz and 82-kg Stappat 450 m/s2 (the highest acceleration tested by Stapp)?
- Sophia, whose mass is 52 kg, experienced a net force of 1800 N at the bottom of a roller coaster loop during her school's physics field trip to the local amusement park. Determine Sophia's acceleration at this location.
- After a lead-off single in the 8th inning, Earl makes an effort to steal second base. As he hits the dirt on his head first dive, his 73.2 kg body encounters 249 N of friction force. Construct a free body diagram depicting the types of forces acting upon Earl. Then determine his acceleration.
- An experimental rocket sled can be accelerated at a constant rate from rest to 450 m/s in 1.8s. What is the engine force if the sled has a mass of 500 kg?
- A firefighter (80 kg) slides down a vertical pole with an acceleration of 5 m/s2. What is the magnitude and direction of the vertical friction force exerted by the pole on the firefighter?
- A worker drags a crate across the factory floor by pulling on a rope tied to the crate. The worker exerts a force of 450 N on the rope that is inclined at 38 above the horizontal, and the floor exerts a horizontal frictional force of 125 N that opposes the motion. Calculate the acceleration of the crate if the crate’s mass is 310 kg.
- A car is traveling at 53 km/h (14.7 m/s) and hits a bridge abutment. The passenger in the car moves forwards a distance of 0.65 m while being brought to rest by the airbag. What is the magnitude of the force that acts on the passenger’s upper torso, which has a mass of 41 kg?
- A 50 kg skier skis down a slope that makes an angle of 8.0 with the horizontal. Determine his acceleration if there is a coefficient of friction between the skis and the snow of 0.1.
- A 100 kg crate slides down an incline of 30as shown below. The incline has a coefficient of friction of 0.5. What is the crates acceleration? Draw and label all the forces acting on both blocks.
- Find the acceleration and the tension force for the drawing shown below if the table surface is frictionless. Draw and label all the forces acting on both blocks.
- An electron and a proton are separated by a distance of 2.1 X 10-12m. What is the magnitude of the gravitational force between them?
- Find g for Jupiter. The mass is: 1.899 X 1027 kg
The radius is:7.15 X 107 m