A Catapult Fires an 800-Kg Rock with an Initial Velocity

question 72

Multiple Choice

A catapult fires an 800-kg rock with an initial velocity of 100 m/s at a 40° angle to the ground. The magnitude of the horizontal impulse the catapult receives from the rock is

• A) 5.1 × 10⁴ N s.
• B) 6.1 × 10⁴ N s.
• C) 8.0 × 10⁴ N s.
• D) 5.0 × 10⁵ N s.
• E) 6.0 × 10⁵ N s.

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Definitions:

Double-blind

An experimental procedure in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias in research results.

Case History

A detailed narrative record or report of a person's background, medical history, or behavioral patterns.

Operant Conditioning

A method of learning that occurs through rewards and punishments for behavior, emphasizing the role of reinforcement in shaping behavior.

Shaping

Is a method in behavioral psychology used to gradually teach a new behavior through reinforcement of successive approximations to the desired behavior.