Concept explainers
These pictures show a cart that is moving at constant velocity.
(a) (b) (c) (d)
The cart that is moving at constant velocity
Answer to Problem 1PLA
Option (b)
Explanation of Solution
Constant velocity specifies that the car covers equal amount of displacement in a given time duration. The carts pictured in the question are all moving in a straight line to the left. From the picture, it is evident that the cart (b) gets displaced equally for every 1.00 s.
Conclusion:
From the picture, it is evident that the cart (b) gets displaced equally for every 1.00 s. Therefore, option (b) is correct.
The displacement of cart in (a) is increasing with time, hence the cart a is not moving with constant velocity.
The displacement of cart in (c) is decreasing with time, hence the cart a is not moving with constant velocity.
The displacement of cart in (d) is not uniform, hence the cart a is not moving with constant velocity.
Want to see more full solutions like this?
Chapter 4 Solutions
Physics Laboratory Manual
- Carol wants to move her 32kg sofa to a different room in the house. She places "sofa disks", slippery disks with mu k =.080 , on the carpet, under the feet of the sofa. She then pushes the sofa at a steady.4 .4 m/s across the floor. How much force does she apply to the sofa?arrow_forwardA skateboard with mass of 50kg is pulled without friction across the ground by a rope that makes an angle of 20 degrees with the horizontal. What force on the rope would be required to move the skateboard at a constant speed of 20 m/s?arrow_forwardI need help in this questionarrow_forward
- A person can dive into water from a height of 10 m without injury, but a person who jumps off the roof of a 10-m-tall building and lands on a concrete street is likely to be seriously injured. Why is there a difference?arrow_forwardA boat has a speed of 8 mph in still water attempts to go directly across a river with a current of 3 mph. What is the effective speed of the boat?arrow_forwardYou are playing with your daughter in the snow. She sits on a sled and asks you to slide her across a flat, horizontal field. Which would be the easiest for you?arrow_forward
- You are working as an expert witness for the defense of a container ship captain whose ship ran into a reef surrounding an island. The captain is being charged with intentionally running the ship into the reef. In discovery, the following information is correct: The ship was traveling at 2.5 m/s toward the reef when a mechanical failure caused the rudder to jam in the straight-ahead position. At that point in time, the ship was 900 m from the reef. The wind was blowing directly toward the reef and exerting a constant force of 9.00 x 103 N on the boat in a direction toward the reef. The mass of the ship and its cargo was 5.50 x 107kg. During the preparation for the trial, the captain claims that without control of the direction of travel, the only choice he had was to put the engines in reverse at maximum power, such that the total force exerted by the frictional drag force of the water on the propeller was 1.25 x 105 N in a direction away from the reef. From this information, construct…arrow_forwardA block starting from rest slides a distance of 5 m down an inclined plane which makes an angle of 37 degrees with the horizontal. The coefficient of friction between block and plane is 0.2, What is the velocity of the block after sliding 5 m? The correct answer is 6.57 m/sarrow_forwardA tired cyclist on a bicycle (102.0 kg combined) starts with an initial velocity of 15.0 m/s at the bottom of a hill and coasts up the hill. He comes to a stop just at the top of the hill. What is the maximum height of the hill?arrow_forward
- Pick an isolated system for the following scenarios while including the fewest number of objects as possible. a. A satellite in orbit around the Earth b. An airplane in flight c. A truck driving along the road d. A person jumpingarrow_forwardA toad with mass of 280 g leaps into the air to catch a fly. If the toad's jump was at an angle of 46 degrees with respect to the horizontal, and with an initial velocity of 4.6 m/s, what is its speed (in m/s) when it reaches its maximum vertical displacement?arrow_forwardSuperman must stop a 110-km/h train in 160 m to keep it from hitting a stalled car on the tracks. The train's mass is 3.6 x 105 kg.arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningGlencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill